Grade 7 Review

QUESTION

What do scientists believe is the driving force of our moving

plates?

ANSWER

Convection Currents in the magma

QUESTION

What SI (metric) unit is used to measure temperature?

QUESTION

What SI (metric) unit is used to measure temperature?

ANSWER

oC

QUESTION

What process do plants use to make food from light?

ANSWER

photosynthesis

QUESTION

How is heat transferred through solids such as metals?

ANSWER

Conduction

QUESTION

A student heats equal amounts of sand and water in identical beakers on a hot plate set at 250oC? He measures the temperature of both substances every minute for 45 minutes.What is a possible hypothesis?

ANSWER

I believe the water will heat up faster than the sand.

QUESTION

A student heats equal amounts of sand and water in identical beakers on a hot plate set at 250oC? He measures the temperature of both substances every minute for 45 minutes.What is the independent variable?

ANSWER

The materials – water or sand

OR

The time

QUESTION

A student heats equal amounts of sand and water in identical beakers on a hot plate set at 250oC? He measures the temperature of both substances every minute for 45 minutes.What is the dependent variable?

ANSWER

The temperature of the materials

QUESTION

A student heats equal amounts of sand and water in identical beakers on a hot plate set at 250oC? He measures the temperature of both substances every minute for 45 minutes.What are three controlled variables?

ANSWER

The temperature hotplate

The amount of material

The size of beaker

The recording times

QUESTION

What SI (metric) unit is used to measure weight?

ANSWER

Newtons

QUESTION

What are three properties used to identify minerals?

ANSWER

Lustre (shine) Colour

Hardness Streak

Cleavage Rock type

QUESTION

What force is indicated in the diagram?

ANSWER

Compression

QUESTION

What force is indicated in the diagram?

ANSWER

Compression

QUESTION

What is this symbol?

ANSWER

Poisonous or toxic material causing SERIOUS or IMMEDIATE effects.

QUESTION

A mixture has ______ or more types of particles?

ANSWER

2

QUESTION

Consider:

Sun grass mouse snake

What is this called?

ANSWER

A food chain

QUESTION

Consider:

Sun grass mouse snake

What is the producer?

ANSWER

Grass

QUESTION

Consider:

Sun grass mouse owl snake

What is the top consumer?

ANSWER

snake

QUESTION

A solution with lots of solute (a very dark glass of iced tea)

is called _______.

ANSWER

Concentrated

QUESTION

What term is used to describe the study of the

earth?

ANSWER

Geology

QUESTION

A solution with lots of solute (a very dark glass of iced tea)

is called _______.

ANSWER

Concentrated

QUESTION

The pyramids or a mountain is considered to be this type of

structure.

ANSWER

mass

QUESTION

Soil is made of these main parts.

ANSWER

Weathered rock (mineral fragments)

Water

Organic Material (Humus)

Air

QUESTION

The three phases or states of matter are...

ANSWER

SOLIDS

LIQUIDS

GASES

QUESTION

Calculate the structural efficiency of the following

building.

MASS of BUILDING = 10 000 kg

MAXIMUM LOAD = 500 000 kg

ANSWER

SE = max load / dead load

= 500 000 kg = 50

10 000 kg

QUESTION

What is the method of heat transfer associated with

fluids?

ANSWER

convection

QUESTION

What is the method of heat transfer associated with

fluids?

ANSWER

convection

QUESTION

What term is used to describe the study of energy &

forces?

ANSWER

Physics

QUESTION

What type of structure is used most often for sports

complexes?

ANSWER

Shell structures

QUESTION

What process do we as animals make energy?

ANSWER

(Cellular) Respiration

QUESTION

How many km in 6500 m?

ANSWER

6.5 km

QUESTION

Consider a glass of orange juice. What process may be

used to separate the pulp from the juice ?

ANSWER

Filtration

QUESTION

What is this symbol?

ANSWER

Oxidizing material

QUESTION

Consider a glass of orange juice. What process may be

used to separate the pulp from the juice ?

ANSWER

Filtration

QUESTION

What are some specific ways trees (and other plants) are

important for us or other animals?

ANSWER

Lumber for building

Shade

Oxygen

Food source for animals (and us)

Habitats for animals

QUESTION

What are these?

ANSWER

Erlenmeyer flasks