8th Grade Science

8th Grade Science - Matter

Energy is the ability to do _____________.
Every physical thing is made of something we call ____________.
All matter has energy.
1. True
2. False
Physical science is the study of _________ matter.
1. living
2. nonliving
4. nervous
Physics deals primarily with the study of :
1. the structure of matter
2. chemical reactions in matter
3. energy and the way it affects matter
4. the properties of matter
In the first step of the scientific method, the scientist asks a question after making a number of ______________.
A possible explanation or answer to a question is called a_______________.
An important characteristic of a good answer or explanation is that it must be:
1. accurate
2. correct
3. testable
4. reasonable
A __________ is a representation of an object or system.
Check which statements below are true about scientific laws
1. A law tells you how things work.
2. A law tells you why things work.
3. A law is a summary of many experimental results and observations.
4. A law is an explanation for many hypotheses and observations.
_________ is the amount of matter in an object.
The amount of space something occupies is called its ________________.
The formula for Density is:
1. D = mV
2. D = V/m
3. D = m/V
4. D = mV²
Water freezes at:

(Check all the correct answers.)
1. 100 degrees C
2. 32 degrees F
3. 212 degrees F
4. 0 degrees C
The measure of the average kinetic energy of the particles in an object is its ____________.
Weight is a measure of the ______________ force exerted on an object.
1 cm³ =
1. 1 L
2. 1 mL
3. 1 cL
The tendency for an object to resist a change in motion is called _______________.
Mass is measured in:
1. liters
2. centimeter
3. newtons
4. kilograms
Check which of the properties of matter below are physical properties.
1. magnetism
2. flammability
3. reactivity
4. ability of conduct electricity
5. density
6. state
Baking a pie is an example of a:
1. physical change only
2. chemical change
The physical state of matter in which the particles of the matter move fast enough to overcome almost all of the attraction between them is the __________ state.
Honey has __________
1. a higher viscosity than water
2. the same viscosity as water
3. a lower viscosity than water
Boyle's Law states that the volume of gas is __________ proportional to the pressure of a gas when the temperature is constant.
1. directly
2. inversely
3. not
Charles Law states that with constant pressure, if you increase the temperature of a gas in a space such as a piston, the volume of the gas will _____________ in the piston.
1. stay the same
2. decrease
3. increase.
To change a substance from one physical state to another, you must add or remove _____________.
While boiling water is evaporating, its temperature continues to increase above 100^◦C.
1. True
2. False
An _____________ is a substance that cannot be separated or broken down into simpler substances by chaemical means.
Check the characteristics of metals:
(Check all that apply.)
1. conduct heat energy
2. are always magnetic
3. are shiny
4. conduct electricity
5. tend to be brittel and unmalleable
Which of the following are chemically combined?
(Check all that apply.)
1. solutions
2. compounds
3. mixtures
4. suspensions
5. colloids
Milk is an example of:
Check all that apply.)
1. a compound
2. a mixture
3. a solution
4. a suspension
5. a colloiod
Water can only be separated into simpler substances by chemical means.
1. True
2. False