5th grade science

Example

Investigation: Does the surface area of a puddle affect how fast it evaporates? Which is the independent variable (the one you change)?

1. Change: surface area of the water. Measure: time for the water to evaporate. Keep the same: volume of water, temperature of the room.
2. So the answer is: surface area of the water

Answer: surface area of the water

Example

Number of cells → Bulb brightness (lux) 5 → 30 4 → 36 30 → 42 20 → 48 50 → 54 What happens to “Bulb brightness (lux)” as “Number of cells” increases?

1. The values go 30, 36, 42, 48, 54.
2. So the answer is: it increases

Answer: it increases

Example

How plants grow: which statement is true?

1. “The energy in plant food comes from the soil.” is not true: The energy comes from sunlight.
2. So the answer is: Most of a plant's mass comes from carbon dioxide in the air and from water.

Answer: Most of a plant's mass comes from carbon dioxide in the air and from water.

Example

How is this new plant produced: a daffodil bulb splitting into new bulbs?

1. A new plant grows from part of one parent and is identical to it.
2. So the answer is: from part of one parent (asexual reproduction)

Answer: from part of one parent (asexual reproduction)

Example

Which invertebrate group does this belong to: snail?

1. Molluscs have soft bodies, often with a shell.
2. So the answer is: mollusc

Answer: mollusc

Example

Is this microorganism helpful or harmful: yeast making bread rise?

1. These microorganisms help us or the environment.
2. So the answer is: helpful

Answer: helpful

Example

On the Galápagos Islands, Charles Darwin noticed finches with different beak shapes on different islands. What did this suggest?

1. Finches with beaks suited to the local food survived and passed on that beak shape.
2. So the answer is: Each kind had adapted to the food on its island.

Answer: Each kind had adapted to the food on its island.

Example

Which state is described: particles packed in a regular pattern?

1. In a solid, particles are packed closely in a regular pattern and vibrate in place.
2. So the answer is: solid

Answer: solid

Example

You blow up a balloon. What keeps it puffed up?

1. Gas particles we cannot see push on the balloon from inside.
2. So the answer is: Billions of air particles hitting the inside of the balloon.

Answer: Billions of air particles hitting the inside of the balloon.

Example

Is this a physical or a chemical change: baking bread?

1. In a chemical change new substances are made.
2. So the answer is: chemical change

Answer: chemical change

Example

A food label says yoghurt contains 2000 kJ per 100 g. How much energy is in a 200 g portion, in kJ?

1. 2000 × 200 ÷ 100 = 4000
2. So the answer is: 4000 kJ

Answer: 4000 kJ

Example

A gap in a line with a small hinged line (lifted up) stands for…

1. An open switch is drawn as a lifted line leaving a gap.
2. So the answer is: an open switch

Answer: an open switch

Example

Two cells are used instead of one, but they are put in facing opposite ways. What happens to the bulb?

1. Cells facing opposite ways cancel out their push.
2. So the answer is: It does not light, because the cells push against each other.

Answer: It does not light, because the cells push against each other.

Example

A ray of light hits a flat mirror at an angle of incidence of 25° (measured from the normal). What is the angle of reflection?

1. angle of incidence = angle of reflection
2. So the answer is: 25°

Answer: 25 °

Example

How does a periscope let you see over a wall?

1. Light travels straight between mirrors; each mirror turns it, so it reaches your eye.
2. So the answer is: Two angled mirrors reflect the light down to your eye.

Answer: Two angled mirrors reflect the light down to your eye.