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Grade 8: Science > Science Final Review > Flashcards

Flashcards in Science Final Review Deck (29)
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1
Q

What should you do if a corrosive material spills on you?

A

Call for help immediately.

2
Q

Why shouldn’t you come in contact with water if a corrosive material spills on you?

A

Some corrosive material can react with was and cause worse effects

3
Q

Describe a material being prepared as a fluid to make it easier to use or transport.

A

Glass Bottle

4
Q

What are the properties of fluids?

A

They must flow and they have no fixed shape

5
Q

What is a pure substance?

A

A pure substance is made of one type of material

6
Q

What is a mechanical mixture?

A

A mixture in which there are two or more materials

7
Q

What is the “concentration” of a solution?

A

How much solute is dissolved in the solvent

8
Q

What factors affect the rate of dissolving?

A

Stirring
Size of pieces
Temperature

9
Q

What is viscosity?

A

It is the friction between the particles

10
Q

How does the particle model of matter explain viscosity?

A

There is less friction when a substance is heated up because there is more space between the particles so they can flow over each other more easily

11
Q

What units are used to measure concentration?

A

Millilitres

12
Q

What is solute?

A

The thing that dissolves in the solvent

13
Q

What is a solvent?

A

The thing that makes the solute dissolve

14
Q

What is density?

A

The amount of particles per a certain area

15
Q

Why is hot water less dense than cold water?

A

Hot water is less dense because it has more spaces in between

16
Q

What is Pascal’s law?

A

An enclosed fluids transmits pressure equally in all directions

17
Q

Describe a technology based on the solubility of a substance

A

Kool-aid

18
Q

How does a hydraulic system work?

A

You push a piston on water and it multiplies force on the second piston

19
Q

What is an organism?

A

Any living thing

20
Q

What is an organ?

A

A group of tissues put together to perform a specific function

21
Q

What is the most basic unit of life?

A

A cell

22
Q

What are the differences between an animal cell and a plant cell?

A

A plant cell has a cell wall and a chloroplast

23
Q

What is diffusion?

A

The movement of particles from high concentration to low concentration

24
Q

What is osmosis?

A

The movement of water from high concentration to low concentration

25
Q

What is the function of an artery?

A

Carry blood away from the heart

26
Q

What is the function of a vein?

A

Carry blood into the heart

27
Q

What is the function of a capillary?

A

Connect arteries and veins

28
Q

Why was the invention of the microscope so important?

A

People were finally able to see small animalcules

29
Q

How do binoculars work?

A

Light goes through two reflective prisms and then to the eyepiece.