Font size
Worksheets8th grade science review- Rachel
Total questions: 24
Worksheet time: 12mins
What happens to water molecules as they heat up?
They move slower
They move faster
They stay the same speed
The molecules spread apart
How many valence electrons are in a boron atom?
8
7
3
4
Which is an example of a chemical change?
Ripping a piece of paper
Cutting a cake
boiling water
A nail rusting
Where is most of the world's water located?
Lakes
Glaciers
Rivers
Oceans
Where is the most freshwater located?
Glaciers
Rivers
Lakes
Pools
What determines whether an object sinks of floats?
Mass
Volume
Density
Weight
Which ocean zone has the most pressure?
Estuaries
Deep Ocean
Intertidal zone
Photic Zone
What type of water is found in an estuary?
Salt water
Fresh water
Brackish water
Muddy water
According to this food web, which of the following is a primary consumer?
A squid
Smaller fish
Shrimp
Plants
Which of the following is NOT a renewable source of energy?
Biofuel
Solar energy
Coal
Hydropower
What is a disadvantage of nuclear power?
If it is not a clean source of energy
There are no disadvantages
It is a nonrenewable source of energy
If there is a mistake is made, it could ruin the surrounding area near the power plant
What effect does excess carbon dioxide have on the environment?
It causes the earth to go into an ice age
Animals would not be able to breathe with too much carbon dioxide
It causes the earth to heat up
It can ruin the movement of the Earth
How much energy is transferred to each level of an energy pyramid?
10%
60%
99%
40%
What abiotic thing provides energy to an ecosystem?
The sun
Rocks
Rivers
Plants
Choose the correct statement about this food web.
(Remember to take the longest path when labeling the consumer level)
The frog is a tertiary consumer.
The frog is a primary consumer.
The frog is a producer.
The frog is a secondary consumer.
How do bacteria reproduce?
Sexually, through spores
Asexually, through spores
Sexually, through binary fission
Asexually, through binary fission
What pathogen(s) does a vaccine protect against?
Bacteria
Virus
Fungi
All of the above
Which of the following pathogens are living? (select all that apply)
Bacteria
Fungi
Virus
Parasite
How could modifying DNA of a crop could benefit humans?
It could make crops more likely to survive harsh conditions
It can choose favorable DNA in a crop
It can make crops healthier
It can cause crops to grow faster
What is a career that involves biotechnology?
Teacher
Architect
Actor
Biomedical engineer
What do carbohydrates provide for your body?
Liquids
Energy
Pleasure
Fiber
Which rock layer is igneous rock?
R
H
M
F
According to this picture, which is an index fossil?
Gastropod
Fern
Trilobite
Ammonite
What are index fossils used for?
To figure out the exact age of a fossil next to it
To tell the relative age of the fossils nearby
To figure out how the organism died
To know when other species went extinct
