Which of these scales is digital? Would you measure the mass of the following in grams or kilograms? Answer the following questions.

Here are the answers to the questions:

2. Which of these scales is digital?
Scales a and d are digital. They display the weight in numbers on a screen.

3. Would you measure the mass of the following in grams or kilograms?

• a. A cow: Kilograms
• b. Flour for baking a cake: Grams
• c. Your own mass: Kilograms
• d. A coin: Grams

4. Answer the following questions.

• a. Will a bag full of feathers have a larger mass than the same size bag half filled with stones?
  • No. A bag half-filled with stones will have a larger mass because stones are much denser than feathers.
• b. We use grams (g) and kilograms (kg) when measuring mass.
  • i. Which unit of measurement do you think we use to measure heavier objects? Kilograms (kg)
  • ii. Which unit of measurement do you think we use for lighter objects? Grams (g)
• c. We make use of scales to weigh objects.
  • i. Is there only one type of scale? No
  • ii. Name some of the types of scales we use and what we use them for.
    • Kitchen scale: for food ingredients
    • Bathroom scale: for measuring people's mass
    • Spring scale: for measuring the mass of various objects
    • Balance scale: for precise measurement of small objects

Measuring the Ingredients
My mother baked a cake. What did she use to measure the ingredients?
Kitchen scale