Write down one food chain from this food web that includes the minnow

• grass -> shrimp -> minnow -> otter

• grass -> periwinkle -> terrapin -> gull

• grass -> periwinkle -> crab -> gull

Write down the producers from this food web

• shrimp minnow otter

• grass

• gull

Write down the name of carnivore from this food web.

• shrimp periwinkle

• grass

• crab, gull

Write down the source of energy for this food web.

• sunlight

• grass

• crab, gull

Baking soda is a white solid.

Vinegar is a colourless solution.

Chen adds baking soda to vinegar.

The mixture fizzes and bubbles and a colourless solution is made.

The temperature of the mixture goes down.

Two of the substances made are carbon dioxide and water

Chen concludes a chemical reaction has taken place.

Write down two observations that support his conclusion

• Baking soda is a white solid.

  Vinegar is a colourless solution.

• The mixture fizzes and bubbles and a colourless solution is made.

  The temperature of the mixture goes down.

• Baking soda is a white solid.

  Two of the substances made are carbon dioxide and water

Baking soda is a white solid.

Vinegar is a colourless solution.

Chen adds baking soda to vinegar.

The mixture fizzes and bubbles and a colourless solution is made.

The temperature of the mixture goes down.

Two of the substances made are carbon dioxide and water

Write down the names of the reactants in this reaction

• Baking soda

  Vinegar

• bubbles and a colourless solution

• carbon dioxide and water

Baking soda is a white solid.

Vinegar is a colourless solution.

Chen adds baking soda to vinegar.

The mixture fizzes and bubbles and a colourless solution is made.

The temperature of the mixture goes down.

Two of the substances made are carbon dioxide and water

Which product is a colourless liquid?

• Baking soda

  Vinegar

• bubbles and a colourless solution

• water

The ray of light is reflected when it touches the bottom mirror.

Describe what happens when a ray of light is reflected.

• bounces’

• (ray of light) changes direction

• nothing happens

Complete the sentences to show the number of reflections from each mirror.

The top mirror has ..... reflections.

The bottom mirror has .... reflections.

• 4 or four

  3 or three

• 1 or one

  3 or three

• 2 or two

  3 or three

Safia wants to increase the total number of reflections.

Describe what Safia does to increase the total number of reflections

• (idea of) increase size of mirror(s)

  move the mirrors closer together

  change the angle of the light/ray

  add another light source or add more light

• make the mirrors the same size’ or change the size of the mirror(s)

  move the mirrors further apart

• change the angle of the mirrors

  make the mirrors shinier or make the light brighter