Iowa / ITBS Science — Grade 7

📋 Test Overview

Test

Iowa / ITBS-style Science practice

Grade level

Grade 7

Length

practice + challenge + 4 explain prompts — more practice than Testing Mom's Grade 7 science set

Skills

Cells & cell processes · genetics & heredity · ecology & ecosystems · classification & evolution · matter & chemistry · forces, motion & energy · Earth & space

How it's upgraded

Each topic is taught first; every answer gets reasoning; a challenge round connects ideas

Standards

MS-LS1–4 · MS-PS1–3 · MS-ESS1–2

Before you start: Grade 7 science digs into cells and genetics, ecosystems and evolution, matter and reactions, forces and energy, and Earth in space.

📌 FlyingMinds rule: Use evidence to explain WHY, and test ideas with a fair experiment.

🔮 WARM-UP · NOT SCORED

🦉 Fred asks: How are photosynthesis and cellular respiration connected?

Starter: Photosynthesis __________, while respiration __________ .

🎯 Practice score: 0 / 50

🟢 Part A — Cells & cell processes

Cells are the unit of life. Photosynthesis stores energy in sugar; cellular respiration releases it.

MS-LS1 · CellsCELLS

1. The organelle where photosynthesis occurs is the —

mitochondrion nucleus chloroplast ribosome

MS-LS1 · CellsCELLS

2. The organelle that releases energy from food (the 'powerhouse') is the —

mitochondrion chloroplast cell wall vacuole

MS-LS1 · CellsCELLS

3. Photosynthesis uses carbon dioxide, water, and sunlight to make —

only water glucose (sugar) and oxygen plastic salt

MS-LS1 · CellsCELLS

4. Cellular respiration uses glucose and oxygen to release —

sunlight soil chlorophyll energy (and carbon dioxide and water)

MS-LS1 · CellsCELLS

5. Which controls which substances pass into and out of the cell?

cell membrane nucleus chloroplast ribosome

MS-LS1 · CellsCELLS

6. Cells divide to make new cells in a process called —

digestion photosynthesis cell division (mitosis) evaporation

MS-LS1 · CellsCELLS

7. Photosynthesis and respiration are nearly REVERSE processes; together they cycle —

only sound only minerals nothing energy and matter (carbon and oxygen)

MS-LS1 · CellsCELLS

8. A group of similar cells working together forms a —

organ system tissue population biome

🔵 Part B — Genetics & heredity

Traits pass from parents to offspring through genes on chromosomes. DNA carries the instructions.

MS-LS3 · HeredityGENETICS

9. The molecule that carries genetic instructions is —

DNA water glucose oxygen

MS-LS3 · HeredityGENETICS

10. A section of DNA that codes for a trait is a —

cell wall ribosome gene tissue

MS-LS3 · HeredityGENETICS

11. An organism with two different forms of a gene (Bb) is —

homozygous a clone sterile heterozygous

MS-LS3 · HeredityGENETICS

12. A trait that is masked when a dominant allele is present is —

dominant recessive inherited only by males learned

MS-LS3 · HeredityGENETICS

13. Offspring of sexual reproduction are —

genetically different from each parent identical to one parent always identical twins not living

MS-LS3 · HeredityGENETICS

14. Asexual reproduction produces offspring that are —

always different genetically identical to the parent sterile nonliving

MS-LS3 · HeredityGENETICS

15. A tool used to predict the chances of offspring traits is a —

barometer food web Punnett square timeline

MS-LS3 · HeredityGENETICS

16. Eye color and height are examples of —

learned skills habits random guesses inherited traits

🟡 Part C — Ecology & ecosystems

Energy flows from producers up through consumers; matter cycles. Populations interact and depend on resources.

MS-LS2 · EcologyECOLOGY

17. In an energy pyramid, the most energy is available at the level of the —

top predators producers decomposers only second consumers

MS-LS2 · EcologyECOLOGY

18. Only about what fraction of energy passes to the next level of a food chain?

about 10% about 90% 100% about 50%

MS-LS2 · EcologyECOLOGY

19. Two species competing for the same limited resource shows —

mutualism predation decomposition competition

MS-LS2 · EcologyECOLOGY

20. A relationship where BOTH species benefit is —

competition predation mutualism parasitism

MS-LS2 · EcologyECOLOGY

21. The role and place an organism has in its ecosystem is its —

niche biome atom gene

MS-LS2 · EcologyECOLOGY

22. If a keystone predator is removed, the ecosystem will most likely —

stay the same gain energy freeze change dramatically

MS-LS2 · EcologyECOLOGY

23. Carbon moves between living things and the air mainly through —

erosion only gravity photosynthesis and respiration magnetism

MS-LS2 · EcologyECOLOGY

24. The maximum population an environment can support is its —

niche carrying capacity biome food web

🟣 Part D — Classification & evolution

Living things are classified by shared traits. Adaptations that aid survival become more common over generations (natural selection).

MS-LS4 · EvolutionLIFE

25. Organisms are grouped by shared characteristics in a system called —

classification (taxonomy) weather geology economics

MS-LS4 · EvolutionLIFE

26. Inherited traits that help an organism survive and reproduce are —

accidents learned tricks decorations adaptations

MS-LS4 · EvolutionLIFE

27. The process by which helpful traits become more common over time is —

memorization erosion natural selection condensation

MS-LS4 · EvolutionLIFE

28. Evidence that species share common ancestors includes —

the weather fossils and similar body structures star maps music

MS-LS4 · EvolutionLIFE

29. Two birds with different beaks adapted to different foods is evidence of —

learned behavior only random chance only adaptation to the environment no relationship

MS-LS4 · EvolutionLIFE

30. Variation within a species is important because it —

makes all individuals identical gives natural selection traits to act on stops evolution removes all genes

⚪ Part E — Matter & chemistry

Atoms make up elements; elements combine into compounds. Mass is conserved in any change.

MS-PS1 · MatterCHEMISTRY

31. The smallest unit of an element is an —

atom cell organ molecule of water

MS-PS1 · MatterCHEMISTRY

32. A pure substance made of one kind of atom is an —

mixture solution compound element

MS-PS1 · MatterCHEMISTRY

33. Water (H₂O) is an example of a —

element mixture compound atom

MS-PS1 · MatterCHEMISTRY

34. In a chemical reaction, the total mass of the products equals the mass of the reactants. This is the law of —

gravity motion reflection conservation of mass

MS-PS1 · MatterCHEMISTRY

35. Which is a sign that a CHEMICAL reaction has occurred?

a new gas, color change, or temperature change the object is moved the object is colder by being in a fridge it is cut in half

MS-PS1 · MatterCHEMISTRY

36. The center of an atom, holding protons and neutrons, is the —

electron cloud nucleus membrane chloroplast

🟢 Part F — Forces, motion & energy

Forces change motion. Energy is conserved and changes form. Newton's laws describe how objects move.

MS-PS2/3 · PhysicsPHYSICS

37. An object's speed in a given direction is its —

mass velocity volume density

MS-PS2/3 · PhysicsPHYSICS

38. Newton's first law says an object at rest stays at rest unless acted on by —

sunlight time gravity only an unbalanced force

MS-PS2/3 · PhysicsPHYSICS

39. Acceleration means an object is —

changing its speed or direction standing still always slowing down weightless

MS-PS2/3 · PhysicsPHYSICS

40. Energy stored in a stretched spring is —

kinetic energy sound energy potential energy light energy

MS-PS2/3 · PhysicsPHYSICS

41. Energy cannot be created or destroyed, only —

changed from one form to another increased forever made from nothing destroyed by friction

MS-PS2/3 · PhysicsPHYSICS

42. Two equal forces pushing in opposite directions are —

unbalanced gravity balanced (no change in motion) friction only

MS-PS2/3 · PhysicsPHYSICS

43. A heavier object requires ___ force to accelerate it the same amount.

less no negative more

MS-PS2/3 · PhysicsPHYSICS

44. Friction between two surfaces produces —

light only heat and slows motion more speed gravity

🔵 Part G — Earth & space

Earth's systems interact; plate tectonics shapes the surface; Earth, Moon, and Sun create cycles.

MS-ESS · Earth & spaceEARTH

45. Earthquakes, volcanoes, and mountains form mainly at —

the equator only the ozone layer cloud tops plate boundaries

MS-ESS · Earth & spaceEARTH

46. The theory that Earth's surface is broken into moving plates is —

the water cycle plate tectonics natural selection the rock cycle only

MS-ESS · Earth & spaceEARTH

47. The tilt of Earth's axis as it orbits the Sun causes —

day and night moon phases the seasons tides only

MS-ESS · Earth & spaceEARTH

48. The pull between the Moon and Earth's oceans causes —

tides earthquakes seasons wind only

MS-ESS · Earth & spaceEARTH

49. Most of the Sun's energy reaches Earth as —

conduction sound radiation (light) wind

MS-ESS · Earth & spaceEARTH

50. The water cycle is powered mainly by energy from the —

Moon Sun core of the Earth tides

🏆 Challenge score: 0 / 12

🏆 Challenge round. Reason and connect ideas like a scientist.

Grade 7 ScienceCHALLENGE

51. A plant kept in the dark stops making sugar. This is because photosynthesis needs —

light energy more soil colder air carbon dioxide only

Grade 7 ScienceCHALLENGE

52. Two parents are both Bb for a trait. About what fraction of offspring are expected to show the recessive trait (bb)?

all of them about 1/2 none about 1/4

Grade 7 ScienceCHALLENGE

53. Removing the top predator from a food web would most likely cause prey to —

disappear increase, then overuse resources become producers stay the same

Grade 7 ScienceCHALLENGE

54. Birds on an island with hard seeds tend to have thick beaks over generations. This shows —

natural selection learned behavior a chemical change the water cycle

Grade 7 ScienceCHALLENGE

55. After a reaction, the products weigh exactly as much as the reactants. This supports —

gravity inertia the rock cycle conservation of mass

Grade 7 ScienceCHALLENGE

56. A cart rolls down a ramp, speeding up. Its energy changes from —

kinetic to potential light to chemical potential to kinetic sound to heat only

Grade 7 ScienceCHALLENGE

57. Marine fossils high on a mountain are best explained by —

fish climbing the Moon's tides plate tectonics lifting ancient seafloor photosynthesis

Grade 7 ScienceCHALLENGE

58. Why do mitochondria matter to an active muscle cell?

they make the cell green they store DNA they cool the cell they release the energy the muscle needs

Grade 7 ScienceCHALLENGE

59. In an energy pyramid, why are there fewer top predators than plants?

predators are bigger energy decreases at each higher level plants are nonliving predators don't eat

Grade 7 ScienceCHALLENGE

60. A fair test of how fertilizer affects plant growth should change —

only the amount of fertilizer the plant, light, and water too everything at once nothing

Grade 7 ScienceCHALLENGE

61. Two species of birds nest in the same tree but eat different insects. They mainly avoid —

competition (different niches) mutualism gravity photosynthesis

Grade 7 ScienceCHALLENGE

62. A 2 kg cart needs more force than a 1 kg cart to reach the same speed because it has more —

color volume of air friction only mass

✍️ Write it. Explain your thinking. Fred checks length, key words, and mechanics.

✍️ EXPLAIN #1 · SCORED

🦉 Fred asks: Explain how photosynthesis and cellular respiration cycle energy and matter together.

Sentence starter: Photosynthesis __________, and respiration __________, so together they __________ .

✍️ EXPLAIN #2 · SCORED

🦉 Fred asks: Two Bb parents have offspring. Explain how to predict the chance of a recessive (bb) child.

Sentence starter: Using a Punnett square, the chance of bb is __________ because __________ .

✍️ EXPLAIN #3 · SCORED

🦉 Fred asks: Explain how natural selection can change a population over many generations.

Sentence starter: Natural selection works because __________, so over time __________ .

✍️ EXPLAIN #4 · CHALLENGE · SCORED

🦉 Fred asks: A reaction's products weigh the same as its reactants. Explain what law this shows and why.

Sentence starter: This shows the law of __________ because __________ .

Science — Grade 7

🔬 Cells & processes

🧬 Genetics & heredity

🌿 Ecology & evolution

⚗️ Matter & chemistry

⚡ Forces & energy

🌍 Earth & space

🟢 Part A — Cells & cell processes

🔵 Part B — Genetics & heredity

🟡 Part C — Ecology & ecosystems

🟣 Part D — Classification & evolution

⚪ Part E — Matter & chemistry

🟢 Part F — Forces, motion & energy

🔵 Part G — Earth & space

Science — Grade 7

🔬 Cells & processes

🧬 Genetics & heredity

🌿 Ecology & evolution

⚗️ Matter & chemistry

⚡ Forces & energy

🌍 Earth & space

🟢 Part A — Cells & cell processes

🔵 Part B — Genetics & heredity

🟡 Part C — Ecology & ecosystems

🟣 Part D — Classification & evolution

⚪ Part E — Matter & chemistry

🟢 Part F — Forces, motion & energy

🔵 Part G — Earth & space

🎉 You finished Science — Grade 7!

📚 Up Next

📋 Assign to Google Classroom