Solved Exercises on Solution Temperature in Grade 2

Master temperature measurement: hot, cold, warm, and comparing temperatures through these 5 detailed exercises.

Solution: Exercises 1 to 3
1 Comparing Temperatures
Exercise 1
Which is hotter: ice water (32°F) or boiling water (212°F)?
Circle the hotter item:
☐ Ice Water
☐ Boiling Water
Definition:

Temperature: How hot or cold something is

Hot: Very warm (like fire or the sun)

Cold: Very cool (like ice or snow)

Warm: In between hot and cold

Comparison method:
  1. Look at the numbers for each temperature
  2. Bigger number = hotter temperature
  3. Smaller number = colder temperature
  4. Compare the two numbers
Ice Water
32°F
Boiling Water
212°F
Result
212°F > 32°F
Step 1: Identify temperatures

Ice water = 32°F and Boiling water = 212°F

Step 2: Compare the numbers

212 is much bigger than 32

Step 3: Determine which is hotter

Since 212°F > 32°F, boiling water is hotter

Boiling water (212°F) is hotter than ice water (32°F)
Final answer:

Boiling water (212°F) is hotter than ice water (32°F)

Applied rules:

• Higher numbers = higher temperatures

• Ice freezes at 32°F

• Water boils at 212°F

2 Measuring Temperature
Exercise 2
If room temperature is 70°F and the oven is 350°F, how much hotter is the oven?
Room Temp: 70°F
Oven Temp: 350°F
Difference: _____°F
Definition:

Difference: How much bigger one number is than another

Subtraction: Take away the smaller number from the bigger number

Oven Temp
350°F
Room Temp
70°F
Difference
280°F
Step 1: Identify the temperatures

Oven = 350°F and Room = 70°F

Step 2: Subtract to find the difference

350°F - 70°F = 280°F

Step 3: State the answer

The oven is 280°F hotter than the room

350°F - 70°F = 280°F
Final answer:

The oven is 280°F hotter than the room

Applied rules:

• Difference = Bigger number - Smaller number

• Always subtract the smaller temperature

• Don't forget the degree symbol (°F)

3 Ordering Temperatures
Exercise 3
Put these temperatures in order from coldest to hottest:
65°F, 90°F, 45°F, 75°F, 32°F
Coldest: _____, _____, _____, _____, _____ :Hottest
Definition:

Ordering: Putting numbers from smallest to biggest (or vice versa)

Coldest: Lowest temperature (smallest number)

Hottest: Highest temperature (biggest number)

Numbers
65°F, 90°F, 45°F, 75°F, 32°F
Sorted
32°F, 45°F, 65°F, 75°F, 90°F
Result
Coldest to Hottest
Step 1: List all temperatures

65°F, 90°F, 45°F, 75°F, 32°F

Step 2: Find the smallest number

32°F is the smallest

Step 3: Find the next smallest

45°F is the next smallest

Step 4: Continue ordering

65°F, then 75°F, then 90°F

32°F, 45°F, 65°F, 75°F, 90°F
Final answer:

From coldest to hottest: 32°F, 45°F, 65°F, 75°F, 90°F

Applied rules:

• Start with the smallest number

• Put numbers in order from low to high

• Check your work by going back

Temperature Rules and Methods
Hot > Warm > Cold
Temperature Order
Freezing Point
32°F
Water turns to ice
Boiling Point
212°F
Water turns to steam
Room Temperature
~70°F
Comfortable inside
Key definitions:

Temperature: How hot or cold something feels

Thermometer: Tool to measure temperature

Degree (°): Unit to measure temperature

Temperature reading method:
  1. Look at the thermometer: Find where the red line stops
  2. Read the number: Find the closest number on the scale
  3. Add the degree symbol: Write °F after the number
Tip 1: The bigger the number, the hotter it is!
Tip 2: Ice water is always 32°F.
Tip 3: Always write the degree symbol (°F) with temperatures.
Common temperatures: Ice = 32°F, Body = 98.6°F, Boiling = 212°F
Solution: Exercises 4 to 5
4 Temperature Change
Exercise 4
The temperature was 50°F in the morning. It went up 15°F by noon. What was the temperature at noon?
Morning: 50°F
Rose by: 15°F
Noon: _____°F
Definition:

Temperature change: When temperature goes up or down

Rose by: Temperature increased by this amount

Went up: We add the increase to the starting temperature

Starting
50°F
Increase
15°F
Result
65°F
Step 1: Identify starting temperature

Morning temperature = 50°F

Step 2: Identify the change

Temperature rose by 15°F

Step 3: Add the change to starting temperature

50°F + 15°F = 65°F

50°F + 15°F = 65°F
Final answer:

The temperature at noon was 65°F

Applied rules:

• When temperature rises: ADD the increase

• When temperature falls: SUBTRACT the decrease

• Always include the unit (°F)

5 Real World Temperature
Exercise 5
Sarah measured the temperature of four items:
Hot chocolate: 160°F
Room temperature: 70°F
Ice cream: 10°F
Swimming pool: 80°F
Which is the hottest? Which is the coldest?
Definition:

Comparison: Looking at numbers to see which is bigger or smaller

Hottest: The item with the highest temperature number

Coldest: The item with the lowest temperature number

Items
160°F, 70°F, 10°F, 80°F
Hottest
160°F
Coldest
10°F
Step 1: List all temperatures

Hot chocolate = 160°F, Room = 70°F, Ice cream = 10°F, Pool = 80°F

Step 2: Find the biggest number

160°F is the biggest number, so hot chocolate is hottest

Step 3: Find the smallest number

10°F is the smallest number, so ice cream is coldest

Step 4: Check the order

10°F < 70°F < 80°F < 160°F

Hottest: 160°F (hot chocolate), Coldest: 10°F (ice cream)
Final answer:

Hottest: Hot chocolate (160°F), Coldest: Ice cream (10°F)

Applied rules:

• Higher number = hotter temperature

• Lower number = colder temperature

• Always compare all numbers to find extremes

Temperature Laws, Methods, Rules, and Definitions
Hot > Warm > Cool > Cold
Temperature Scale
Key definitions:

Temperature: Measurement of how hot or cold something is

Thermometer: Instrument used to measure temperature

Degree Fahrenheit (°F): Unit of temperature measurement

Freezing point: Temperature where water turns to ice (32°F)

Boiling point: Temperature where water turns to steam (212°F)

Complete methodology:
  1. Identify the temperatures: Look for numbers with °F
  2. Understand the context: Know if you're comparing, adding, or ordering
  3. Apply the method: Compare numbers, add changes, or arrange in order
  4. Verify the result: Check if the answer makes sense
Tip 1: Remember: 32°F = freezing, 212°F = boiling, ~70°F = room temp
Tip 2: When temperature rises, add the change. When it falls, subtract.
Tip 3: Bigger numbers always mean hotter temperatures.
Tip 4: Always write the unit (°F) with temperature measurements.
Common errors: Forgetting units, confusing bigger numbers with colder temperatures, mixing up addition/subtraction for temperature changes.
Memory aids: "More degrees = More heat", "Big numbers are hot", "Small numbers are cold".
Temperature facts to remember:

• Freezing point of water: 32°F

• Boiling point of water: 212°F

• Average room temperature: 70°F

• Human body temperature: 98.6°F

• Higher numbers = hotter temperatures

Temperature Visualization: Daily Temperatures
Exercise 6: Daily Temperature Patterns
Consider the following daily temperatures:
Morning: 55°F
Noon: 75°F
Evening: 65°F
Night: 45°F

Analysis: The chart shows how temperature changes throughout the day.

  • Noon (75°F) is the hottest part of the day
  • Night (45°F) is the coldest part of the day
  • Morning (55°F) is cooler than evening (65°F)

Questions & Answers

Question: My child is having trouble understanding that higher numbers mean hotter temperatures. How can I help them visualize this concept?

Answer: Great question! Here are some effective strategies for 2nd graders:

  • Create a physical number line with temperature words: "Cold" at lower numbers, "Warm" in the middle, and "Hot" at higher numbers
  • Use real examples: Show them that 90°F (summer day) is hotter than 40°F (winter day)
  • Draw thermometers with different levels and associate feelings: "When the red line goes up, we feel warmer"
  • Play comparison games: "Is 80°F hotter or colder than 60°F?" with immediate feedback

The key is connecting abstract numbers to concrete experiences like feeling warm on a sunny day versus shivering in winter.

Question: When I see 50°F and 40°F, how do I know which one is hotter? They're both cold to me!

Answer: That's a smart observation! You're right that both feel cold, but mathematically:

  • 50°F is still hotter than 40°F because 50 is a bigger number than 40
  • Think of it like this: if you had 50 cookies vs 40 cookies, you'd have more with 50
  • Temperature works the same way - more degrees means more heat
  • Both are cold, but 50°F is 10 degrees warmer than 40°F

Remember: "Bigger number = more heat" even if both temperatures feel cold to us!

Question: Why do we use degrees (°F) instead of just saying how hot or cold something is?

Answer: Great question! We use degrees because:

  • Words like "hot" and "cold" are subjective - what feels hot to one person might not to another
  • Degrees give us exact measurements so everyone understands the same temperature
  • We can compare temperatures precisely: 70°F is exactly 10 degrees warmer than 60°F
  • It's like using inches to measure height instead of saying "tall" or "short"

Degrees give us a universal language for temperature that scientists, weather reporters, and cooks can all understand!