WorksheetsMini 8th Grade Science Review
Total questions: 10
Worksheet time: 8mins
Which of the following statements about the process of science are TRUE?
As new evidence is gathered, scientific models are refined and changed.
When a model is supported by a lot of scientific evidence, it is usually accepted by the scientific community.
Once something is a theory it is never changed, even if new evidence arises.
If evidence doesn't support our hypothesis, we ignore that evidence.
Identify the subatomic particles shown in blue in the diagram.
protons
electrons
neutrons
What are some elements of a good hypothesis?
It answers your question.
It's correct.
It's based on observations, previous knowledge, and/or logic.
It can be tested.
How does the # of bugs in a compost bin affect the time it takes for organic matter to decompose? Identify the dependent variable.
time it takes for organic matter to decompose
# of bugs in a compost bin
amount of organic matter in the compost bin
temperature and humidity around the compost bin
Silicon (atomic number = 14) is a
metal
nonmetal
metalloid
What information do you need to calculate the density of an unknown substance?
mass
color
texture
volume
Which of these statements is TRUE about two blocks of silver that are different shapes but have the same volume?
They have the same mass, but different densities.
They have different masses and different densities.
They have different masses, but the same density.
They have the same mass and the same density.
Which of the following statements are TRUE about atoms?
Atoms are mostly made up of empty space.
99% of an atom's mass is in the nucleus.
The nucleus of an atom contains neutrons and electrons.
The electrons in an atom are negatively charged.
Global warming is
caused by excess greenhouse gases in the atmosphere.
can be stopped and even reversed by reducing the amount of greenhouse gases in the atmosphere.
causing earth's climates to change.
caused by a hole in the ozone layer.
What information can you get by examining this chemical formula, Cu(NO3)2(aq)
The substance is made up of two elements.
The substance is a solid dissolved in water.
The substance contains copper, Cu.
The substance is flammable.
