3rd Grade

Science Review

Created by: Kelly Rooney

April 17, 2004

Table of Contents

1. SOL 3.2: Simple Machines

3. SOL 3.3: Matter

4. SOL 3.4: Life Processes

5. SOL 3.5: Living Systems

6. SOL 3.6: Living Systems: habitats

7. SOL 3.7: Soil

8. SOL 3.8: Sun, Earth and Moon

9. SOL 3.8: Life Cycles

9. SOL 3.9: Water Cycle

10. SOL 3.10: Resources

11. SOL 3.11: Sources of Energy

SOL 3.2- Simple Machines

A lever moves around a fixed point

called a fulcrum.

*A simple machine helps people do work!*

A wedge is a made up of two inclined planes placed back-to-back

A wheel and axle is made up of a large wheel attached to a

smaller wheel or rod.

SOL 3.2- Simple Machines, cont..

A pulley is a rope or chain and a wheel around which the

rope fits

A screw is an inclined plane

wrapped around a pole that is

usually used to hold things together.

An inclined plane is a flat surface with

one end higher than the other.

SOL 3.3- Matter

•Objects can be described by their physical properties.

•A physical property is anything that can be observed using the senses.

•Objects are made of one or more materials

•materials are made up of parts that are too small to see with out magnification

•physical properties remain the same when the object is reduced in size.

SOL 3.4- Life Processes

Mimicry

Migration

hibernation

camouflage

Instinct

Behavioral and physical adaptations help an animal to survive

SOL 3.5- Living Systems

Animals and plants are interdependent

producer

consumer

decomposerherbivore

carnivore

omnivore

SOL 3.6- Living Systems, cont..

Environments support a diversity of plants and animals share limited resourcesDry-land environments

Deciduous forest

Desert

rainforest

grassland

Coniferous forest

Water-related environments

SOL 3.6- Living Systems, cont..

Environments support a diversity of plants and animals share limited resources

wetland river

stream

ocean pond

SOL 3.7- Soil

•soil provides the support and nutrients necessary for plant growth•topsoil is a natural product of subsoil and bedrock;rock, clay, silt, sand, and humus are components of soils•soil is a natural resource and should be conserved

bedrock

subsoiltopsoil

SOL 3.8- Earth Patterns, Cycles, and Change

The Earth revolves around the sun. Each

time it makes one revolution, we have

one year!

The earth rotates on its axis which causes us to

have night and day.

SOL 3.8- Earth Patterns, Cycles, and Change

The tilt of the Earth causes seasons. When one

hemisphere is experiencing summer, the opposite

hemisphere is experiencing winter.

Tides are caused by the gravitational pull

of the moon

The sun rises in the East

And sets in the West

SOL 3.8- Earth Patterns, Cycles, and Change

A life cycle is all the parts of a plant or an animal's life from birth to death. The life cycle of a bird is made up of unhatched chick, chick,

young adult, and adult

SOL 3.9-The Water Cycle

evaporation

condensation

precipitation

The energy from the sun drives the

water cycle.

Water is a natural resource and needs to be

conserved.

SOL 3.10- Resources

natural events and human influences can affect the survival of species

Air pollution

conservation

Floods

recycling

SOL 3.10- Sources of Energy

Renewable resources

Nonrenewable resources

Fossil fuels:

coal, oil and natural gas

Sources of energy: sunlight, water, wind, wood and

fossil fuels

SOL K.5- Sink or Float

sink float

Some objects will float on water, while others will sink.

float sinkwood

fruit

paper

metal

metal

SOL 1.2- Moving Objects

straight circular

curved back and forth: vibrations

Examples include: humming, strumming a

guitar, or plucking a rubber band

The motion of objects may be:

SOL 1.3- Materials interacting with waterSome liquids will dissolve in water,

while others will not.

Most substances will dissolve better in hot water than they will in cold water.

Things that will mix easily in water

Things that will not mix easily easily in water

vinegar

milk

baking soda

powered drink mix

sugar

salt

Oil

sand

soil

rocks

SOL 2.2- Magnets

A magnet is a piece of iron that pulls things that are also made of iron or nickel.

Similar magnet poles repel, opposite poles attract.

SOL 2.6- Weather

Common types of storms

floods

blizzard Tornado

hurricane drought

SOL 2.6- Weather

We use various tools measure weather.

thermometer

Rain gauge

Weather vane