Life Science (Grade 7) Midterm — Units 5–6
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Free printable Life Science midterm (Grade 7): 20 multiple-choice questions plus 1 written response covering Human Body Systems, Ecosystems. Answer key included — customize it in the Midterm Maker.
Life Science (Grade 7) Midterm — Units 5–6
Name: Date: Period:
Directions: Read each question carefully and choose the best answer. Answer the written response in complete sentences.
Covers: Human Body Systems · Ecosystems
Part 1: Multiple Choice
-
Which body system uses electrical signals to control and coordinate the body?
- A. Nervous system
- B. Digestive system
- C. Skeletal system
- D. Endocrine system
-
Which organs filter wastes from the blood and produce urine?
- A. Kidneys
- B. Stomach
- C. Lungs
- D. Heart
-
How do skeletal muscles move bones?
- A. By pushing bones apart
- B. By releasing hormones
- C. By growing longer
- D. By contracting and pulling on them
-
What is the main job of white blood cells?
- A. Carrying oxygen
- B. Fighting infections
- C. Clotting blood
- D. Digesting food
-
Sweating on a hot day to keep body temperature steady is an example of what?
- A. Homeostasis
- B. Reproduction
- C. Circulation
- D. Digestion
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Which body system uses hormones to regulate growth and other body functions?
- A. Respiratory system
- B. Nervous system
- C. Endocrine system
- D. Muscular system
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Which blood vessels carry blood away from the heart?
- A. Arteries
- B. Alveoli
- C. Veins
- D. Capillaries
-
Where are most nutrients from food absorbed into the blood?
- A. Esophagus
- B. Stomach
- C. Large intestine
- D. Small intestine
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Which organ pumps blood throughout the body?
- A. Kidneys
- B. Liver
- C. Heart
- D. Lungs
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In the lungs, oxygen and carbon dioxide are exchanged in tiny air sacs called what?
- A. Bronchi
- B. Alveoli
- C. Trachea
- D. Diaphragm
-
Which is a biotic factor in a pond ecosystem?
- A. Sunlight
- B. Water temperature
- C. Frogs
- D. Rocks
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What is the largest population that an environment can support over time called?
- A. Succession
- B. Limiting factor
- C. Carrying capacity
- D. Biodiversity
-
A tick feeding on a dog's blood is an example of what?
- A. Competition
- B. Parasitism
- C. Commensalism
- D. Mutualism
-
All the deer living in one forest make up a what?
- A. Population
- B. Community
- C. Biome
- D. Ecosystem
-
Which organism is a producer?
- A. Mushroom
- B. Grass
- C. Rabbit
- D. Hawk
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A relationship in which both species benefit is called what?
- A. Parasitism
- B. Predation
- C. Mutualism
- D. Commensalism
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In a food web, what do the arrows show?
- A. Which organisms are related
- B. Which animal is the largest
- C. Where each animal lives
- D. The direction energy flows
-
On average, about what percent of energy is passed from one feeding level to the next?
- A. 10%
- B. 100%
- C. 50%
- D. 90%
-
What is an animal that eats only plants called?
- A. Herbivore
- B. Decomposer
- C. Carnivore
- D. Omnivore
-
What is the main role of decomposers in an ecosystem?
- A. Hunting other consumers
- B. Pollinating flowering plants
- C. Making food from sunlight
- D. Breaking down dead matter and returning nutrients to the soil
Part 2: Written Response
- Describe a simple food chain in a local ecosystem. Explain how energy moves through it and what might happen if one population disappeared.
Answer Key — Life Science (Grade 7) Midterm — Units 5–6
- A — Nervous system Nerves carry electrical signals to and from the brain.
- A — Kidneys Kidneys remove wastes and extra water from blood.
- D — By contracting and pulling on them Muscles can only pull, so they work in pairs.
- B — Fighting infections White blood cells defend the body against germs.
- A — Homeostasis Homeostasis keeps internal conditions stable.
- C — Endocrine system Glands of the endocrine system release hormones into the blood.
- A — Arteries Arteries carry blood away; veins return it to the heart.
- D — Small intestine The small intestine's villi absorb most nutrients.
- C — Heart The heart is the muscular pump of the circulatory system.
- B — Alveoli Alveoli are surrounded by capillaries where gases are exchanged.
- C — Frogs Biotic factors are living things.
- C — Carrying capacity Carrying capacity depends on food, water, space, and other resources.
- B — Parasitism The parasite benefits while the host is harmed.
- A — Population A population is one species living in one area.
- B — Grass Producers make their own food, usually by photosynthesis.
- C — Mutualism In mutualism, both partners gain something.
- D — The direction energy flows Arrows point from the organism eaten to the organism that eats it.
- A — 10% Most energy is used for life processes or lost as heat.
- A — Herbivore Herbivores are primary consumers that feed on plants.
- D — Breaking down dead matter and returning nutrients to the soil Decomposers recycle nutrients from dead organisms.
Written Response — Look-Fors
- Correct producer → consumers order; arrows show energy flow; about 10% of energy passes up; mentions decomposers; predicts reasonable ripple effects on other populations.