8th grade Science practice sheet
Maine Learning Results · from Gradelings · Name: ______________________
Question 1
A wave's wavelength is…
- the speed of the wave
- the number of waves in a second
- the distance from one crest to the next
- the height of the wave
the distance from one crest to the next
Hint: Frequency is the number of waves per second. Amplitude is the height.
Question 2
What is the difference between speed and velocity?
- velocity includes direction
- speed includes direction
- they are the same
- velocity is slower
velocity includes direction
Hint: 60 km/h north is a velocity.
Question 3
Food and batteries store…
- gravitational energy
- sound energy
- chemical potential energy
- kinetic energy
chemical potential energy
Hint: In chemical bonds.
Question 4
Iron filings around a bar magnet show…
- magnetic field lines
- electric current
- heat
- gravity
magnetic field lines
Hint: Lines from pole to pole.
Question 5
A dominant allele…
- shows its trait when present
- is always harmful
- only appears in plants
- never shows
shows its trait when present
Hint: Capital letter.
Question 6
Individuals with helpful traits are more likely to…
- die young
- survive and reproduce
- change their DNA on purpose
- stop reproducing
survive and reproduce
Hint: Pass on genes.
Question 7
We live in the…
- Cenozoic Era
- Mesozoic Era
- Precambrian
- Paleozoic Era
Cenozoic Era
Hint: Age of mammals.
Question 8
Which has the longest wavelength?
- ultraviolet
- radio waves
- visible light
- X-rays
radio waves
Hint: In order from longest to shortest: radio, microwave, infrared, visible, ultraviolet, X-ray, gamma.
Question 9
A 2 kg object accelerates at 3 m/s². What force acts on it?
- 1.5 N
- 5 N
- 9 N
- 6 N
6 N
Hint: F = 2 × 3.
Question 10
A roller coaster at the bottom of a hill has the most…
- chemical energy
- potential energy
- kinetic energy
- nuclear energy
kinetic energy
Hint: Fastest point.
Answer key
- 1. the distance from one crest to the next (Light & Radiation)
- 2. velocity includes direction (Motion, Forces & Newton’s Laws)
- 3. chemical potential energy (Kinetic & Potential Energy)
- 4. magnetic field lines (Fields & Forces at a Distance)
- 5. shows its trait when present (Genes & Heredity)
- 6. survive and reproduce (Natural Selection)
- 7. Cenozoic Era (Earth's History & Fossils)
- 8. radio waves (Light & Radiation)
- 9. 6 N (Motion, Forces & Newton’s Laws)
- 10. kinetic energy (Kinetic & Potential Energy)
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.