Science Unit A

Question 1

WHIMS

Answer 1

Workplace Hazardous Materials Information System

Question 2

Fluid

Answer 2

Anything that has no fixed shape and can flow. Can be a liquid or a gas

Question 3

Slurry

Answer 3

This mixture of water and solids is called a slurry. Slurry technology—the transport of solids in water—is important in many applications.

Question 4

Pure Substance

Answer 4

Only made up of one kind of matter

Question 5

Mixture

Answer 5

Made up of many different substances

Question 6

Mechanical Mixture

Answer 6

You can see the different substances that make up the mixture

Question 7

Heterogeneous Mixture

Answer 7

Soil and mixed vegetables are both mechanical mixtures. This type of mixture is sometimes called a heterogeneous mixture.

Question 8

Solution

Answer 8

looks as if it is all one substance.

Question 9

Suspension

Answer 9

a cloudy mixture in which droplets or tiny pieces of one substance are held within another substance.

Question 10

Colloid

Answer 10

A cloudy mixture but the droplets are so small, they cannot be seperated

Question 11

Solute

Answer 11

The substance that dissolves

Question 12

Solvent

Answer 12

The substance that does the dissolving

Question 13

Concentration

Answer 13

Tells you the amount of solute dissolved in a specific amount of solvent

Question 14

Unsaturated solution

Answer 14

when the crystals do not dissolve

Question 15

saturated

Answer 15

when no more solute can dissolve at a specific temperature

Question 16

Solubility

Answer 16

the maximum amount of of solute you can add at a fixed volume

Question 17

Aqueous solution

Answer 17

the solvent is water. Aqua is the Latin word for water.

Question 18

Particle Model of Matter

Answer 18

can help to explain these and other situations. The particle model has four main points that describe the structure of matter.

Question 19

Viscosity

Answer 19

It is determined by a fluid’s internal resistance or friction that keeps it from flowing

Question 20

Density

Answer 20

is the amount of matter in a given volume.

Question 20

Density

Answer 20

is the amount of matter in a given volume.

Question 21

How to calculate density

Answer 21

D = mass/volume

Question 22

Buoyant force

Answer 22

that pushes the object upward.

Question 23

Buoyancy

Answer 23

the tendency of an object to float when placed in a fluid.

Question 24

Plimsol line

Answer 24

TF = Tropical Fresh Water
F = Fresh Water
T = Tropical Salt Water
S = Summer Salt Water
W = Winter Salt Water
WNA = Winter North Atlantic

Question 25

Compressibility

Answer 25

When a force pushes on an object, the object is said to be under compression.

Question 26

Incompressible

Answer 26

Cannot be compressed easily

Question 27

Pressure

Answer 27

the amount of force applied to a given area. It is measured in pascals (Pa).

Question 28

Pressure is calculated

Answer 28

P = Force/Area

Question 29

Pascal’s Law

Answer 29

states that an enclosed fluid transmits pressure equally in all directions.

Question 30

Hydraulic System

Answer 30

A system that uses water

Question 31

Pneumatic system

Answer 31

When the system uses air

Question 32

Phosphates

Answer 32

Make detergents work in hard water

Question 33

Pump

Answer 33

is a device that moves fluid through or into something.

Question 34

Pipeline pigs

Answer 34

The “pig” cleans the pipe with brushes as it moves through.

Question 35

Valves

Answer 35

are an important part of any system for moving fluids. They are devices to control or regulate the amount of flow, like the valves in your bathroom taps.

Question 36

On the surface

Answer 36

When the submarine is on the surface, its ballast tanks are full of air.

Question 37

Diving

Answer 37

To dive, the submarine releases air from the ballast tanks through valves on the top of the tanks. Other valves at the bottom of the tanks open and allow seawater to enter

Question 38

Re - surfacing

Answer 38

To the surface, compressed air is forced into the ballast tanks through the valves at the top.

Question 39

Basic living things

Answer 39

• are made of cells
• need energy
• grow and develop
• respond to the environment
• reproduce
• have adaptations for their
environment