Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Grade 9: Science > Unit B: Section 4.0 > Flashcards

Unit B: Section 4.0 Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

When does a chemical reaction take place?

A

When two or more substance combine to form a new substance

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the materials at the start of a reaction called?

A

Reactants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What are the new materials called?

A

Products

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In a chemical word equation what do plus signs do?

A

Separate the reactants from each other and the products from each other

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What does an arrow in a word equation do?

A

Separate the reactants and the products

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is evidence of a chemical change?

A

Change in Color
Change in odour
Formation of solid or gas
Release of absorption or heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is an endothermic reaction?

A

A chemical reaction that absorbs heat energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What does an endothermic reaction feel like?

A

Cold to the touch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What does an exothermic reaction?

A

A chemical reaction that releases heat energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does an exothermic reaction feel like?

A

Warm to the touch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is combustion?

A

A chemical reaction that occurs when oxygen reacts with a substance and gives off energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is corrosion?

A

The slow chemical change that occurs when oxygen in the air reacts with metal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is Cellular Respiration?

A

A chemical reaction that takes place in the cells in your body. Food reacts with oxygen to produce, energy, water, and carbon dioxide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the law of conservation of mass?

A

That matter is not created or destroyed in a chemical change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is an open system?

A

A reaction is open to the environment

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is a closed system?

A

No additional matter is allowed to enter or leave

17
Q

What four factor affect the rate of a chemical reaction?

A

The presence of a catalyst
The concentration of reactants
The temperature of the reactants
The surface area of the reactants

18
Q

What are catalysts?

A

Substances that help a reaction proceed faster. They are present with the reaction but are not consumed during the reaction

19
Q

How does the concentration help the rate of a chemical reaction?

A

The greater the concentration of the reactant the faster the reaction

20
Q

How does temperature affect the rate of a chemical reaction?

A

The more heat added to the reactants the faster the reaction. The heat causes the atoms to move faster increasing the chances of their colliding with each other.

21
Q

how does surface area affect the rate of a chemical reaction?

A

The greater surface area means more area is available for reaction

Grade 9: Science (20 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions