Food and Energy

• Science
• Lower Secondary (Key Stage 3)

Food and Energy

What organ system contains the stomach and the intestines

1. Circulatory system
2. Urinary System
3. Digestive system
4. Central nervous system

What pH is stomach acid?

1. pH 1-2
2. pH 3-4
3. pH 5-6
4. pH 7

What would you see when a piece of metal is added to an acid.

1. Rainbow
2. Fizzing and moving around
3. Lilac flame
4. acid disappears

What is the resultant force on this object ?

1. 7N left
2. 3N left
3. 7N right
4. 3N right

What is one difference between a series circuit and a parallel circuit ?

In all the circuits we have studied so far, what provided the energy to make the bulb light up?

How many joules is 3000 kJ?

1. 3 J
2. 30 000 J
3. 3 000 000 J
4. 300 000 J

What type of energy is in food, coal, and batteries?

1. Kinetic Energy
2. Thermal Energy
3. Gravitational Energy
4. Chemical Energy

What is the unit of energy?

1. Newtons
2. Watts
3. Amps
4. Joules

An egg contains 300 kJ of energy.
How many joules is that?

1. 300 000 J
2. 0.3 J
3. 3 000 J
4. 30 000 J

An apple contains 400 000 J of energy.
How many kilojoules is that?

1. 40 kJ
2. 400 kJ
3. 4 000 kJ
4. 40 000 kJ

What is 2000J in kJ?

1. 2 000 000 kJ
2. 2 000 kJ
3. 2 kJ
4. 20 kJ

What is 3kJ in joules?

1. 0.003 J
2. 300 J
3. 30 J
4. 3 000 J

What is 500J in kJ?

1. 5 kJ
2. 0.5 kJ
3. 50 kJ
4. 5000 kJ

What is 10 000 joules in kilojoules kJ?

1. 1 kJ
2. 10 kJ
3. 100 kJ
4. 1000 kJ

What is 0.4kJ in joules

1. 4 J
2. 4000 J
3. 40 J
4. 400 J

What is 25 kJ in joules?

1. 250 J
2. 2500 J
3. 25 000 J
4. 0.025 J

How many joules of energy is in an entire mars bar?

Which of these foods has the most energy per serving?

Which of these foods has the most energy per 100g?

How much energy would you get if you ate a sausage sandwich with one sausage?

Why might you need more energy than me?

Match the activity with the amount of energy needed

Working

Relaxing

Playing

Sleeping

300kJ

3600kJ

360kJ

600kJ

Match the activity with their energy for each minute

6 kJ

7 kJ

13 kJ

15 kJ

25

60

73

running

swimming

cycling

walking

standing

sitting

washing

Why do we need energy while we are sleeping?

Which of these people will gain weight?

1. A
2. B
3. C
4. D

What breaks down food in a digestion tank?

What gas is produced in the process?