Quiz about 7th science MTR 2024

Question 1

A characteristic that can be observed or measured without changing the substance.

Accepted Answer

E. physical property

Answer

A. chemical process

Answer

B. synthetic materials

Answer

C. compound

Answer

D. pure substance

Question 2

An insoluble solid formed from a chemical reaction.

Accepted Answer

precipitate

Answer

synthetic materials

Answer

compound

Answer

chemical process

Answer

pure substance

Question 3

. A single substance, either an element or compound, with definite composition and properties.

Accepted Answer

D. pure substance

Answer

A. chemical process

Answer

B. synthetic materials

Answer

C. compound

Answer

E. physical property

Question 4

Materials made from one or more natural substances that undergo a chemical process.

Accepted Answer

B. synthetic materials

Answer

A. chemical process

Answer

E. physical property

Answer

D. pure substance

Answer

C. compound

Question 5

A characteristic that can be observed or measured only when atoms rearrange during a chemical change.

Accepted Answer

chemical property

Answer

compound

Answer

chemical process

Answer

pure substance

Answer

synthetic materials

Question 6

A method or means of changing one or more chemicals or chemical compounds.

Accepted Answer

A. chemical process

Answer

D. pure substance

Answer

B. synthetic materials

Answer

C. compound

Answer

E. physical property

Question 7

The process by which one or more substances change to produce one or more different substances.

Accepted Answer

chemical reaction

Answer

chemical process

Answer

synthetic materials

Answer

pure substance

Answer

compound

Question 8

A new substance with unique chemical and physical properties formed when two or more elements are chemically bonded during a chemical reaction.

Accepted Answer

C. compound

Answer

A. chemical process

Answer

B. synthetic materials

Answer

D. pure substance

Answer

E. physical property

Question 9

Dissolving.

Accepted Answer

B. physical property

Answer

A. chemical property

Question 10

Corrosion.

Accepted Answer

A. chemical property

Answer

B. physical property

Question 11

Freezing.

Accepted Answer

B. physical property

Answer

A. chemical property

Question 12

Combustibility.

Accepted Answer

A. chemical property

Answer

B. physical property

Question 13

Evaporating.

Accepted Answer

B. physical property

Answer

A. chemical property

Question 14

Mass.

Accepted Answer

B. physical property

Answer

A. chemical property

Question 15

The total kinetic energy of the tiny particles that make up matter; the faster the particles the warmer the matter becomes.

Accepted Answer

thermal energy

Answer

temperature

Answer

atom

Answer

solid

Answer

molecule

Question 16

The average kinetic energy of all the particles in a material; measured by a thermometer in degrees (usually degrees Celsius or degrees Fahrenheit).

Accepted Answer

temperature

Answer

liquid

Answer

atom

Answer

molecule

Answer

solid

Question 17

The simplest unit of a chemical compound that can exist, formed when two or more atoms join together chemically.

Accepted Answer

molecule

Answer

liquid

Answer

temperature

Answer

solid

Answer

atom

Question 18

The molecules in this state create a structure with definite volume but no definite shape.

Accepted Answer

liquid

Answer

temperature

Answer

molecule

Answer

solid

Answer

atom

Question 19

The molecules in this state have no definite shape or volume.

Accepted Answer

gas

Answer

atom

Answer

solid

Answer

temperature

Answer

molecule

Question 20

The molecules create a structure that has a specific shape and volume.

Accepted Answer

solid

Answer

molecule

Answer

atom

Answer

temperature

Answer

liquid

Question 21

Some of the atoms present before the reaction will always be lost during a chemical reaction.

Accepted Answer

false

Answer

true

Question 22

The same number of each type of atom will always be present before and after a chemical reaction takes place.

Accepted Answer

true

Answer

false

Question 23

If a chemical equation is balanced, the reactant side has a greater mass.

Accepted Answer

false

Answer

true

Question 24

If a chemical equation is balanced, elements with the same atomic number are on both sides.

Accepted Answer

false

Answer

true

Question 25

A liquid becoming a solid is an indication of the addition of thermal energy.

Accepted Answer

false

Answer

true

Question 26

If a chemical equation is balanced, an equal amount of atoms are on both sides.

Accepted Answer

true

Answer

false

Question 27

The amount of heat required to raise the temperature of 1 g by 1 degree Celsius.

Accepted Answer

specific heat

Answer

thermal

Answer

conductor

Answer

insulator

Question 28

The constant movement of water through the land, air, oceans, and living things.

Accepted Answer

water cycle

Answer

gravity

Answer

condensation

Answer

atmosphere

Question 29

The force that causes objects with mass to attract one another.

Accepted Answer

gravity

Answer

condensation

Answer

atmosphere

Answer

water cycle

Question 30

The layer of gas surrounding a planet that is held in place by gravity.

Accepted Answer

atmosphere

Answer

gravity

Answer

condensation

Answer

water cycle

Question 31

The change from a gas state to a liquid state.

Accepted Answer

condensation

Answer

gravity

Answer

atmosphere

Answer

water cycle

Question 32

When will the use of personal safety equipment NOT be required?

Accepted Answer

Whenever you walk into the classroom.

Answer

Whenever you are working with chemicals.

Answer

Whenever you are working with heat.

Answer

Whenever you are working with glassware.

Question 33

Air pressure is measured with a _________.

Accepted Answer

barometer

Answer

thermometer

Answer

weather balloon

Answer

weather vane

Question 34

Which of the following statements is true?

Accepted Answer

Burning paper is an example of a chemical reaction because a new substance is formed and the process cannot be undone.

Answer

Cutting paper is an example of a chemical reaction because a new substance is formed and the process cannot be undone.

Answer

Freezing water is an example of a chemical reaction because a new substance is formed and the process cannot be undone.

Answer

Melting ice is an example of a chemical reaction because a new substance is formed and the process cannot be undone.

Question 35

As thermal energy is added to a substance, which of the following changes can be predicted?

Accepted Answer

Vibration of individual particles will increase.

Answer

Spacing between particles will decrease.

Answer

Temperature of the substance will decrease.

Answer

The pressure of the substance will increase.

Question 36

In making a pizza, which process involves a chemical change?

Accepted Answer

Baking the dough to form the crust

Answer

Mixing spices for the sauce

Answer

Spreading cheese on the pizza

Answer

Slicing pepperoni for the topping

Question 37

The two beakers contain different amounts of pure water. One has 50mL and one has 100mL of pure water. Which of the following properties is the same for both of these samples?

Accepted Answer

boiling point

Answer

mass

Answer

weight

Answer

volume

Question 38

A jeweler (a person who makes jewelry) has a small bar of gold. Gold is an element, so it is a pure substance. The jeweler removes a small piece of gold from the bar to make a ring. What is TRUE about the smaller piece of gold?

Accepted Answer

The mass of the smaller piece of gold will decrease but the melting point will stay the same.

Answer

Both the mass and the melting point of the smaller piece of gold will be lower.

Answer

Both the mass and the melting point of the smaller piece of gold will stay the same.

Answer

The melting point of the smaller piece of gold will decrease but the mass will stay the same.

Question 39

What information do you use when you make a hypothesis? (Select ALL THAT APPLY)

Accepted Answer

background knowledge

Accepted Answer

information gathered from observations

Answer

information not yet known

Answer

none of the above

Question 40

What personal safety equipment will NOT be used in your school laboratory?

Accepted Answer

hardhats

Answer

protective gloves

Answer

chemical splash goggles

Answer

rubber aprons

Question 41

Before mixing sugar into hot tea, a student recorded the observations

shown in the table. Which physical property of the sugar will stay the same after the

sugar is mixed with the hot tea?

Accepted Answer

Mass

Answer

Color

Answer

Texture

Answer

Shape

7th science MTR 2024

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