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Fifth grade science > Grade 5 California science Unit A Chapter 2 > Flashcards

Grade 5 California science Unit A Chapter 2 Flashcards

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1
Q

What is evaporation?

A

Evaporation is when particles of the liquid become a gas

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2
Q

What is a freezing point?

A

A physical property. The temperature at which a substance changes from liquid to solid

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3
Q

What is a melting point?

A

A physical property. The temperature at which a solid changes to a liquid

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4
Q

What is the boiling point?

A

A physical property. The temperature at which a liquid turns into a gas.

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5
Q

What is the evidence of a chemical change?

A

Production of a gas or a solid or a color change. Also noise heat light or fizzing.

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6
Q

Is burning a chemical change or a physical change?

A

Burning is a chemical change that produces ash, carbon dioxide, and water.

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7
Q

What are physical changes?

A

Physical changes are changes in size, shape, volume, or state of matter. Matter keeps the same properties. Examples include sawing wood, shredding paper, and melting wax.

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8
Q

What is a decomposition reaction?

A

In a decomposition reaction, compound split apart to form smaller compounds.

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9
Q

What is a chemical equation?

A

A chemical equation shows what happens during a chemical reaction when a reactant is changed into a product

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10
Q

What are chemical changes?

A

Chemical changes occur when one kind of matter changes into a different kind of matter with different properties examples include cooking food for burning the candle.

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11
Q

What is a combination reaction?

A

Elements or compounds come together to form a new compound.

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12
Q

What is a product in a chemical reaction?

A

A substance made by a reaction always listed on the right side of the arrow

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13
Q

What is the law of conservation of mass?

A

Matter cannot be created or destroyed total mass of reactants equals total mass of products.

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14
Q

What is a reactant?

A

The starting materials in the chemical reaction.

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15
Q

What is evaporation?

A

When molecules of the liquid become a guess

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16
Q

What are the three phases or states of matter?

A

Solid, liquid, gas for water these are ice, liquid water, and water vapor

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17
Q

What is a replacement reaction?

A

When two or more compounds split apart and the parts switch places.

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18
Q

What does universal indicator paper do?

A

Changes colors to identify acids and bases.

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19
Q

What is sublimation?

A

When a solid turns directly into a gas. An example is dry ice becoming carbon dioxide.

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20
Q

He changing vase from a solid directly to a gas is called

A

Sublimation

21
Q

A ——- happens when one substance changes into another substance

A

Chemical change

22
Q

During a ——–such as tearing or crushing, a substance keeps its identity.

A

Physical change

23
Q

A sentence that describes a chemical reaction using symbols is called a

A

Chemical equation

24
Q

Substance formed by chemical reaction is called a

A

Product

25
Q

The change of phase from the gas to liquid is called

A

Condensation

26
Q

A substance that is used in a chemical reaction is called a

A

Reactant

27
Q

Is ice melting a physical change or a chemical change?

A

Physical change

28
Q

Is an Iron gate rusting an example of a physical change or chemical change?

A

A chemical change. The iron in the gate is combining with oxygen in the air to form iron oxide or rust.

29
Q

Paper being torn an example of a physical change or chemical change?

A

Physical change.

30
Q

Is a salt forming an example of a physical change or chemical change?

A

A chemical change

31
Q

What happens when a chemical change occurs?

A

One kind of matter changes into a different kind of matter with different properties.

32
Q

What can you observe that might be evidence of a chemical reaction?

A

Chemical changes often produce a gas or a solid. Chemical changes can also cause heat, light, fizzing, or color change.

33
Q

What are some physical changes that matter can go through?

A

Changes in size, shape, volume, and state of matter are physical changes.

34
Q

What kind of matter has particles that are able to move around a lot?

A

A gas.

35
Q

What kind of matter has particles that can barely move?

A

Solid.

36
Q

Okay matter has particles that can slide by one another? A solid, liquid, or a gas?

A

Liquid.

37
Q

What are the characteristics of a solid?

A

Solids have their own shape and a solid volume does not change.

38
Q

What are the characteristics of a liquid?

A

Liquids do not have their own shape. They take their shape of their container.

39
Q

Are the characteristics of the gas?

A

Compared to solids and liquids, particles of a gas are very far apart. Has they are very far apart gas particles generally do not affect one another unless they collide.

40
Q

What do we call the temperature at which a liquid becomes a solid?

A

The freezing point.

41
Q

As an example of condensation?

A

When grass is wet in the morning, it is because water vapor from the air has touched the cold grass and condensed into liquid drops.

42
Q

Hydrogen peroxide can break apart to form water and oxygen. Which type of chemical reaction is this (replacement, decomposition, or combination)?

A

A decomposition reaction

43
Q

What is the product of magnesium and oxygen?

A

Magnesium oxide.

2Mg + O2 —–> 2MgO

44
Q

What does the law of conservation of mass say?

A

Matter cannot be created or destroyed during a chemical reaction.

45
Q

Which Can only be separated by chemical process (matter, a mixture, a solution, or compound)?

A

A compound.

46
Q

What is a chemical change? Give an example of something that is going through a chemical change.

A

A chemical change occurs when one kind of matter changes into a different kind of matter with different properties. Fire is a chemical change where wood is converted into Ash, water vapor, and carbon dioxide gas.

47
Q

What is the product of the chemical change? Give an example.

A

When a chemical change occurs reactants are rearranged to form problem. In a fire wood under the chemical change to become, carbon dioxide, and water vapor.

48
Q

Give an example of how a chemical reaction can be used to separate important elements?

A

Iron ore contains iron oxide. heating iron ore in a hot furnace with carbon allows the iron to separate from the oxygen in the ore.The result is pure iron and carbon dioxide. This process works because of chemical properties.

Fifth grade science (1 decks)

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