WorksheetsDiagnostic Test in Science 7
Total questions: 20
Worksheet time: 11mins
What do you call a pure substance containing only one kind of atom?
element
mixture
compound
What does this picture represent?
element
compound
mixture
Which describes a change that takes place when a chocolate bar melts?
A solid becomes a gas.
A liquid becomes a gas
A solid becomes a liquid.
A liquid becomes a solid.
Which of the following processes is responsible for changing liquid water into water vapor?
photosynthesis
condensation
evaporation
precipitation
6. Periodic table consists of how many elements?
24
118
98
68
The things that are kept the same to ensure the results are due to the experiment is called...
Control
Constant
Independent Variable
Dependent Variable
Angel wants to know if the type of soap has an effect on how clean her clothes get. What is the independent variable?
type of soap
how long the laundry takes
amount of soap
how clean the clothes are
Neutralization is a reaction between
Acid and base
Acid and a neutral substance.
Two acids
Two bases
The diagram below represents a phase change,
Which of the following best describes what is happening in the diagram?
Gas is changing into a liquid because thermal energy is being added to the system.
. A liquid is changing into a gas because thermal energy is being added to the system.
A liquid is changing into a gas because thermal energy is being removed from the system.
A gas is changing into a liquid because thermal energy is being removed from the system.
Molecules in this phase of matter are tightly packed together.
Solid
Liquid
Gas
Plasma
What is the measure of how much matter an object has?
Weight
Gravity
Mass
Speed
Which of the following is not an example of a physical change?
At 100 degrees celsius, what happens to water?
It condenses.
It freezes.
It melts.
It boils.
What is a substance that has only one kind of atom?
salt
ion
element
atom
