8th grade Science practice sheet
New York State Learning Standards · from Gradelings · Name: ______________________
Question 1
Which has the longest wavelength?
- radio waves
- ultraviolet
- X-rays
- visible light
radio waves
Hint: In order from longest to shortest: radio, microwave, infrared, visible, ultraviolet, X-ray, gamma.
Question 2
Where does photosynthesis happen in a plant cell?
- chloroplasts
- mitochondria
- ribosomes
- nucleus
chloroplasts
Hint: Chloroplasts contain chlorophyll, which captures light energy.
Question 3
What is the difference between mass and weight?
- they are the same
- weight is the amount of matter
- mass is the amount of matter, and weight is the force of gravity on it
- mass is a force
mass is the amount of matter, and weight is the force of gravity on it
Hint: Your mass is the same on the Moon, but your weight is less.
Question 4
If speed doubles, kinetic energy…
- halves
- becomes four times as large
- doubles
- stays the same
becomes four times as large
Hint: KE depends on speed squared.
Question 5
Like electric charges…
- disappear
- repel
- become neutral always
- attract
repel
Hint: Positive pushes positive.
Question 6
Genes are found on…
- cell walls
- mitochondria only
- ribosomes
- chromosomes
chromosomes
Hint: In the nucleus.
Question 7
Organisms usually produce more offspring than can survive. This leads to…
- no predators
- competition for resources
- identical offspring
- unlimited food
competition for resources
Hint: Not everyone gets enough.
Question 8
The Finger Lakes and many New York valleys were shaped during the most recent…
- Ice Age
- Cambrian explosion
- Bronze Age
- age of the dinosaurs
Ice Age
Hint: Glaciers covered the state.
Question 9
Which is the largest planet?
- Mars
- Jupiter
- Mercury
- Earth
Jupiter
Hint: A gas giant.
Question 10
Cell phones send information using…
- radio waves
- sound waves
- earthquake waves
- ocean waves
radio waves
Hint: Electromagnetic waves.
Answer key
- 1. radio waves (Light & Radiation)
- 2. chloroplasts (Cells & Life Processes)
- 3. mass is the amount of matter, and weight is the force of gravity on it (Motion, Forces & Newton’s Laws)
- 4. becomes four times as large (Kinetic & Potential Energy)
- 5. repel (Fields & Forces at a Distance)
- 6. chromosomes (Genes & Heredity)
- 7. competition for resources (Natural Selection)
- 8. Ice Age (Earth's History)
- 9. Jupiter (Space Systems)
- 10. radio waves (Digital & Analog Signals)
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.