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Grade 8: Science > Science Final Review > Flashcards

Flashcards in Science Final Review Deck (29):
1

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

Call for help immediately.

2

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

Some corrosive material can react with was and cause worse effects

3

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

Glass Bottle

4

What are the properties of fluids?

They must flow and they have no fixed shape

5

What is a pure substance?

A pure substance is made of one type of material

6

What is a mechanical mixture?

A mixture in which there are two or more materials

7

What is the "concentration" of a solution?

How much solute is dissolved in the solvent

8

What factors affect the rate of dissolving?

Stirring
Size of pieces
Temperature

9

What is viscosity?

It is the friction between the particles

10

How does the particle model of matter explain viscosity?

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

What units are used to measure concentration?

Millilitres

12

What is solute?

The thing that dissolves in the solvent

13

What is a solvent?

The thing that makes the solute dissolve

14

What is density?

The amount of particles per a certain area

15

Why is hot water less dense than cold water?

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

16

What is Pascal's law?

An enclosed fluids transmits pressure equally in all directions

17

Describe a technology based on the solubility of a substance

Kool-aid

18

How does a hydraulic system work?

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

19

What is an organism?

Any living thing

20

What is an organ?

A group of tissues put together to perform a specific function

21

What is the most basic unit of life?

A cell

22

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

A plant cell has a cell wall and a chloroplast

23

What is diffusion?

The movement of particles from high concentration to low concentration

24

What is osmosis?

The movement of water from high concentration to low concentration

25

What is the function of an artery?

Carry blood away from the heart

26

What is the function of a vein?

Carry blood into the heart

27

What is the function of a capillary?

Connect arteries and veins

28

Why was the invention of the microscope so important?

People were finally able to see small animalcules

29

How do binoculars work?

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