7th grade Science practice sheet
Washington State Learning Standards · from Gradelings · Name: ______________________
Question 1
Which particles are found in the nucleus (center) of an atom?
- only electrons
- neutrons and electrons
- electrons and protons
- protons and neutrons
protons and neutrons
Hint: Electrons move around the outside of the nucleus. Protons and neutrons are packed in the center.
Question 2
Lake water warms during a heat wave and holds less dissolved oxygen. How might this affect fish?
- Fish are not affected at all
- Fish breathe more easily
- Fish that need a lot of oxygen may struggle to survive
- All fish grow faster
Fish that need a lot of oxygen may struggle to survive
Hint: Warm water holds less dissolved oxygen, an abiotic factor that fish need.
Question 3
A grasshopper eats grass. A frog eats the grasshopper. The frog is a…
- secondary consumer
- producer
- decomposer
- primary consumer
secondary consumer
Hint: A primary consumer eats producers. A secondary consumer eats primary consumers.
Question 4
Put the stages of primary succession in order.
- 🪨Bare rock
- 🌾Soil builds up and grasses grow
- 🌲A mature forest develops
- 🌱Shrubs and small trees take over
Bare rock → Soil builds up and grasses grow → Shrubs and small trees take over → A mature forest develops
Hint: Bare rock, then lichens and mosses, then soil and grasses, then shrubs, then forest.
Question 5
Water as ice, as liquid water and as water vapor has the same kind of particle. What differs in each state?
- Whether the water is pure
- How the particles are arranged and how they move
- The number of different substances
- The kind of particle
How the particles are arranged and how they move
Hint: Changing state changes the arrangement and motion, not the kind of particle.
Question 6
Which plant is best suited to a very dry, windy field?
- One that needs shade all day
- One with deep taproots and narrow leaves
- One with wide, thin leaves and shallow roots
- One that needs flooded soil
One with deep taproots and narrow leaves
Hint: Deep roots reach water and narrow leaves lose less of it.
Question 7
A hand warmer gets hot because of an…
- electric shock
- endothermic reaction
- physical change only
- exothermic reaction
exothermic reaction
Hint: Iron reacting with oxygen.
Question 8
Earth's outer layer is broken into large pieces called…
- mantle cells
- tectonic plates
- crusts of ice
- cores
tectonic plates
Hint: They move slowly.
Question 9
Stormwater runoff in cities can carry…
- oil and chemicals into Puget Sound
- sunlight
- fresh fish
- clean drinking water only
oil and chemicals into Puget Sound
Hint: Drains lead to waterways.
Question 10
Which is an ecosystem service?
- A road being paved
- Wetlands filtering water
- A mall opening
- A factory making cars
Wetlands filtering water
Hint: Nature's work.
Answer key
- 1. protons and neutrons (Atoms & Elements)
- 2. Fish that need a lot of oxygen may struggle to survive (Ecosystems)
- 3. secondary consumer (Food Chains & Energy)
- 4. Bare rock → Soil builds up and grasses grow → Shrubs and small trees take over → A mature forest develops (Cycles & Succession)
- 5. How the particles are arranged and how they move (Particles & Mixtures)
- 6. One with deep taproots and narrow leaves (How Plants Work)
- 7. exothermic reaction (Chemical Reactions)
- 8. tectonic plates (Earth's Moving Surface)
- 9. oil and chemicals into Puget Sound (Resources & Hazards)
- 10. Wetlands filtering water (Biodiversity & Puget Sound)
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.