Grade 8 Science Exam Study Guide

95 Questions | By Poetryangel166 | Updated: Mar 22, 2022 | Attempts: 534

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Unit A-E A- Mix and Flow of Matter B- Cells and Systems C- Light and Optics D- Mechanical Systems E- Fresh and Salt Water Systems

Questions and Answers

1.

______________ are highly senitive to light, while ____________ detect colour.
- A.
  
  Cones are highly sensitive to light, while rods detect colour.
- B.
  
  Rods are highly sensitive to light, while cones detect colour.
2.

Which one is NOT used for a reservoir?
- A.
  
  Irrigation
- B.
  
  Littering
- C.
  
  Hydro-Electricity
- D.
  
  Drinking
3.

Unit A If you tried to compress a solid, liquid and a gas, ____________ would be the easiest to compress.
- A.
  
  Solid
- B.
  
  Liquid
- C.
  
  Gas
4.

Hazard Symbol: Yellow Triangle
- A.
  
  Danger
- B.
  
  Caution
- C.
  
  Warning
5.

Hazard Symbol: Orange Diamond
- A.
  
  Warning
- B.
  
  Danger
- C.
  
  Caution
6.

Hazard Symbol: Red Octagon
- A.
  
  Warning
- B.
  
  Caution
- C.
  
  Danger
7.

Define: Fluid
- A.
  
  Anyhing that has no fixed shape and can flow
- B.
  
  Anything that has a fixed shape and can flow
- C.
  
  Anything that can flow
8.

____________ & ____________ are forms of matter that will take the shape of their container
- A.
  
  Solid & Gas
- B.
  
  Liquid & Solid
- C.
  
  Liquid & Gas
9.

Define: Slurry
- A.
  
  A mixture of gas and liquid
- B.
  
  A mixture of liquid and solids
- C.
  
  A mixture of solids and gas
10.

Define: Pure Substance
- A.
  
  Looks like one substance but more
- B.
  
  More than one type of substance
- C.
  
  Made up of one type of substance
11.

Define: Mechanical Mixture
- A.
  
  Made up of one type of substance
- B.
  
  Made up of more than one type of substance
- C.
  
  Looks like one type of substance but more
12.

Define: Solution
- A.
  
  Looks like one type of substance but more
- B.
  
  More than one type of substance
- C.
  
  Made up of one type of substance
13.

Define: Colliod
- A.
  
  Homogeneous Mixture
- B.
  
  Cloudy Mixture
- C.
  
  Heterogeneous Mixture
14.

Define: Solute
- A.
  
  The substance doing the dissolving
- B.
  
  The substance being dissolved
15.

Define: Solvent
- A.
  
  The substance doing the dissolving
- B.
  
  The substance being dissolved
16.

The four main parts of the particle model matter are....
- A.
  
  All matter is made up of tiny particles They never move They have space between them They are attracted to each other
- B.
  
  They are always moving They have space between them They can bounce off each other
- C.
  
  All matter is made up of tiny particles They are always moving They have space between them They have space between them
17.

Particles move the slowest in a ____________ and quickest in a ____________
- A.
  
  Slowest in a liquid, Quickest in a Solid
- B.
  
  Slowest in a Gas, Quickest in a liquid
- C.
  
  Slowest in a Solid, Quickest in a Gas
18.

Heating a material will ___________ particle motion
- A.
  
  Increase
- B.
  
  Decrease
19.

Define: Viscosity
- A.
  
  A Solid's internal resistance
- B.
  
  A Liquid's internal resistance
- C.
  
  A Gas's internal resistance
20.

As temperature ____________ viscosity ___________
- A.
  
  Increases viscosity Decreases
- B.
  
  Decreases viscosity equals
21.

Define: Buoyant Force
- A.
  
  Tendancy of an object to float
- B.
  
  Force acting on an object upward in a fluid
- C.
  
  When a diver floats suspended in water
22.

Define: Buoyancy
- A.
  
  When a diver is suspended in water
- B.
  
  A force acting on a object upward in a fluid
- C.
  
  Tendancy of an object to float when placed in a fluid
23.

Define: ___________ is when a diver is suspended in water when the force of gravity equals the buoyant force
- A.
  
  Neutral Buoyancy
- B.
  
  Buoyancy
- C.
  
  Buoyant force
24.

An object will sink when....
- A.
  
  Gravity is less than the buoyant force
- B.
  
  Gravity is greater than the buoyant force
25.

Define: Plimsoll Line
- A.
  
  Where a ship is to be loaded
- B.
  
  How heavy a ship is to be loaded
- C.
  
  Where a ship is to be stopped