Question

Directions: Use your knowledge of integers to solve each problem.

1. The melting point of sodium is 98 degrees Celsius (oC) and the melting point of zinc is 420oC. How much hotter is the melting point of zinc than that of sodium?

2. The average temperature of Venus is 480oC. The average temperature on Pluto is –2300C. How much warmer is Venus than Pluto?

3. Aluminum melts at 6590C and copper melts at 10830C. What is the difference between the melting points of aluminum and copper?

4. The boiling point of water is 212 degrees Fahrenheit (0F). Propane boils at about –440F. How much hotter is the boiling point of water than that of propane?

5. Unleaded gas freezes around –1500F. Water freezes at 320F. What is the difference between the two freezing points?

6. The temperature on the planet Mercury varies from 4000C on the day side to –1800C on the dark side. What is the difference in temperature?

7. The freezing point of oxygen is –218.790C and hydrogen is –252.80C. A lab is lowering the temperature inside a fridge. Which freezes first? How much colder does it have to be for both to freeze?

8. The temperature in Montreal, Quebec at 3 pm is 10C. The temperature drops to –90C at 3 am. How many degrees did the temperature drop?

9. The moon experiences many extremes in temperature because it has no atmosphere. For example, on the side of the moon that the sun is shining on, the temperature can reach 2600F. On the dark side of the moon, it gets as cold as –2800F. How much is the drop in temperature from day to night?

10. Gold melts at 19460F. Silver melts at 17620F. How much cooler is the melting point of silver than gold

Integers and Science

Objective: Understand and explain the relationship between integers and science

Answer 1

1. 420°C – 98°C = 330°C

2. 480°C – ⁻230°C = 480°C + ⁺230°C = 710°C

3. 659°C – 1083°C = ⁻424°C

4. 212°F – ⁻44°F = 212°F + ⁺44°F = 256°F

5. 32°F – ⁻150°F = 32°F + ⁺150°F = 182°F

6. 400°C – ⁻180°C = 400°C + ⁺180°C = 580°C

7. Oxygen freezes first since ⁻218.79 °C > ⁻252.8 °C

⁻218.79 °C - –252.8 °C = ⁻218.79 °C + ⁺252.8 °C = 34.01 °C

8. 1°C – ⁻9°C = 1°C + +9°C = 10°C

9. 260°F – ⁻280°F = 260°F + ⁺280°F = 540°F

10. 1762°F – 1946°F = ⁻184°F