7th grade Science practice sheet
Alabama Course of Study · from Gradelings · Name: ______________________
Question 1
Which structure is found in plant cells but not animal cells?
- Cell membrane
- Mitochondria
- Nucleus
- Cell wall
Cell wall
Hint: It gives plants stiffness.
Question 2
What are the products of cellular respiration?
- energy, carbon dioxide and water
- only sugar
- glucose and oxygen
- only oxygen
energy, carbon dioxide and water
Hint: Cells use glucose and oxygen to release energy, making carbon dioxide and water.
Question 3
A microscope has a 15× eyepiece and a 4× objective lens. What is the total magnification?
answer box×
60 ×
Hint: Multiply the two lenses: 15 × 4 = 60.
Question 4
What are the reactants of photosynthesis?
- glucose and carbon dioxide
- carbon dioxide and water
- oxygen and water
- glucose and oxygen
carbon dioxide and water
Hint: Plants take in carbon dioxide from the air and water from the soil.
Question 5
During which stage do chromosomes line up in the middle of the cell?
- prophase
- anaphase
- telophase
- metaphase
metaphase
Hint: In metaphase, chromosomes line up along the cell's center before being pulled apart.
Question 6
Put the path of liquid waste (urine) through the excretory system in order.
- Kidneys filter wastes out of the blood
- Urine leaves the body through the urethra
- The bladder stores urine
- Ureters carry urine down from the kidneys
Kidneys filter wastes out of the blood → Ureters carry urine down from the kidneys → The bladder stores urine → Urine leaves the body through the urethra
Hint: The kidneys clean the blood first. Tubes called ureters lead to the bladder, which stores urine until it leaves through the urethra.
Question 7
Follow one drop of blood. Start when the heart pumps it to the lungs.
- 🫀The heart pumps blood to the lungs
- 💪The heart pumps it out to the body
- 🫁Blood picks up oxygen in the lungs
- ↩️Oxygen-rich blood returns to the heart
- 🔄Cells take the oxygen and blood heads back
The heart pumps blood to the lungs → Blood picks up oxygen in the lungs → Oxygen-rich blood returns to the heart → The heart pumps it out to the body → Cells take the oxygen and blood heads back
Hint: Blood goes from the heart to the lungs for oxygen, back to the heart, out to the body, and then back to the heart again.
Question 8
Producer, consumer or decomposer? Sort each organism.
Sort into: 🌿 producer · 🐇 consumer · 🍄 decomposer
- 🟢algae in a pond
- 🍞bread mold
- 🐇a rabbit
- 🦅a hawk
- 🦠bacteria in a compost pile
- 🌾grass
🌿 producer: algae in a pond, grass · 🐇 consumer: a rabbit, a hawk · 🍄 decomposer: bread mold, bacteria in a compost pile
Hint: Producers make their own food from sunlight (plants, algae). Consumers eat other living things. Decomposers break down dead matter (many fungi and bacteria).
Question 9
Put the steps of the water cycle in order.
- ♨️Water evaporates from lakes and oceans
- 🌧️Rain or snow falls
- ☁️Water vapor cools and condenses into clouds
- 🌊Water runs off or soaks in and collects in lakes and oceans
Water evaporates from lakes and oceans → Water vapor cools and condenses into clouds → Rain or snow falls → Water runs off or soaks in and collects in lakes and oceans
Hint: Water evaporates, condenses into clouds, falls as precipitation and then collects, ready to evaporate again.
Question 10
A deer population grows larger than its food supply. What is most likely to happen next?
- Some deer starve and the population drops
- The food supply grows to match the deer
- The deer stop needing food
- The population keeps rising forever
Some deer starve and the population drops
Hint: When a population passes the carrying capacity, limiting factors push it back down.
Answer key
- 1. Cell wall (Cells: Life's Building Blocks)
- 2. energy, carbon dioxide and water (Cells & Life Processes)
- 3. 60 × (Cells, Tissues & Organs)
- 4. carbon dioxide and water (Photosynthesis & Respiration)
- 5. metaphase (Cells from Cells)
- 6. Kidneys filter wastes out of the blood → Ureters carry urine down from the kidneys → The bladder stores urine → Urine leaves the body through the urethra (Body Systems)
- 7. The heart pumps blood to the lungs → Blood picks up oxygen in the lungs → Oxygen-rich blood returns to the heart → The heart pumps it out to the body → Cells take the oxygen and blood heads back (Heart, Bones & Muscles)
- 8. 🌿 producer: algae in a pond, grass · 🐇 consumer: a rabbit, a hawk · 🍄 decomposer: bread mold, bacteria in a compost pile (Food Chains & Energy)
- 9. Water evaporates from lakes and oceans → Water vapor cools and condenses into clouds → Rain or snow falls → Water runs off or soaks in and collects in lakes and oceans (Cycles & Succession)
- 10. Some deer starve and the population drops (Ecosystems)
Want more than 10 questions?
In Gradelings the questions change every time and adjust to your child, with hints and kind feedback. See all science units.