haw we see thing

physical and chemical change

Different changes

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1. Which substance can dissolve completely in water? 

Sand

Flour

Salt

2. Substances that dissolve in water are called 

solutions

insoluble

soluble

3. How could you separate a mixture of sand and salt? 

Mix with water, filter, and then evaporate

Mix with water, evaporate and then filter

Filter and then mix with water

4. Will the steam from seawater be salty? 

Yes

No

Some of the steam will be salty

5. Are melting, freezing, boiling, evaporating and condensing ALWAYS reversible changes? 

No

Yes

Only sometimes

6. Which of these is a reversible change? 

Metal rusting

Baking a cake

Freezing orange juice to make an ice lolly

7. Which of these is an irreversible change? 

Candle wax melting

Candle wax burning

Ice cream melting

8. What new materials are formed when a candle burns? 

Melted wax

Water and carbon dioxide and soot

No new materials are formed

9. How could you change burnt paper back into its original form? 

Cool it

Scrape off the soot

You can't

10. Which of these statements is FALSE? 

Freezing is not a reversible change

Heating a substance can cause both reversible and irreversible changes

Dissolving is a reversible change

physical and chemical change

the quze of the week

Plants and animals

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1. Which of these things are you NOT likely to find in a park or garden? 

An earthworm

An oak tree

A crab

2. Which of these animals is most likely to live in a pond? 

A water spider

A caterpillar

An ant

3. Which of these is most likely to grow in woodland? 

Algae

An oak tree

A cactus

4. A habitat is 

an animal behaviour

a shop where animals go to buy things for their homes

a place where animals and plants live

5. Which collection of animals might you find in a seashore habitat? 

Zebras, lions and elephants

Owls, caterpillars, oak trees

Barnacles, seagulls, crabs

6. A frog is adapted to its pond habitat by 

being brightly coloured

having webbed feet

growing into an adult frog

7. Why does a heron have a long sharp beak? 

To catch fish

To look cool

To fly faster

8. Why do African elephants have big ears? 

To keep cool

To hear better

To fly

9. Where would you expect to find a woodlouse? 

In a hot, sunny place

In a dark, damp place

In a dark, dry place

10. Which habitat does a rabbit live in? 

Desert

Meadow

River

life of the plants

Life cycle of a flowering plant

These are the main parts of a flower.

Flowering plants go through the following life cycle.

How seeds are made

1. Pollen is carried by insects or blown by the wind from one flower to another. This process is called pollination.
2. Pollen reaches the carpel of the new flower, where it fertilises egg cells in the ovary to make seeds. This process is called fertilisation.
3. The seeds are scattered by animals or the wind. This process is calleddispersal. Some of the seeds will grow into new plants.

plants and animals

the parts of flowers

the quiz of the week

1. When is a shadow formed? 

When the light is turned off

When the path of light is blocked by an object

When an object falls to the floor

2. When an object blocks the path of light, what is formed? 

A shadow

A reflection

A fog

3. When an object moves closer to a light source, its shadow... 

gets bigger

gets smaller

stays the same size

4. Which will make the darkest shadow? Light shining on a... 

sheet of thin tissue paper

glass window

wooden chopping board

5. Materials that light can pass through are called... 

transparent

translucent

opaque

6. Materials through which light cannot pass are called... 

transparent

translucent

opaque

7. Where would be a shady place to stand on a sunny day? 

In the sea

Under a tree

In the middle of a football pitch

8. Why do shadows made by the Sun move over the course of a day? 

Because the weather changes

Because someone moves the objects

Because the Sun appears to move across the sky each day

9. When the Sun is behind you, your shadow is... 

behind you

above you

in front of you

10. Shadows made by the Sun are shortest... 

in the morning, when the Sun is rising

at midday, when the Sun is directly overhead

in the evening, when the Sun is setting

the light

Light Top of Page Light, whether from the sun or some object, travels in a straight line. This can be easily seen by shining a flashlight in the dark. Light rays can bounce off materials, like walls, to provide light to other areas like around corners. Light is a form of energy. If you hold your hand near a light you will feel it get hot. Some light sources can get so hot that they can burn you. Some objects, like windows, are transparent allowing light to pass through them. Other objects are opaque, blocking the light from going through them. Shadows Top of Page If you hold your hand underneath a light, you will see a shadow of your hand. This is because your hand is opaque. It does not let the light shine through it. Therefore, the area behind your hand is dark, forming a shadow. Reflection Top of Page Some surfaces, like a mirror, cause the light to bounce off. The light bounces off, or reflects back, at the same angle that it hit the surface. The amount of light reflected depends on the type of surface. Shiny surfaces reflect lots of light. Dull surfaces reflect very little light. When you look in a mirror, you see yourself because the light shining on your body is reflected from the mirror back to your eyes. Refraction Top of Page When a light ray travels through a material the direction of the light will change. This is called refraction. The amount the light bends depends on the type of material. A lense can cause light to change direction. If you have ever used a magnifying class to focus light to a small point, you are seeing refraction at work. Books on Light Top of Page

What Are the Parts of a Flower?

Most plants reproduce with the help of flowers. Help Bud and Sprout name each part of the flower below.

Part is the sticky part of the pistil that pollen sticks to.

Is it the anther, ovule, or stigma?