Solved Exercises on Temperature Basics in Grade 2

Master temperature basics: measuring temperature, comparing temperatures, reading thermometers, temperature scales, and daily temperature changes through these 5 detailed exercises.

Solution: Exercises 1 to 3
1 Reading Thermometers
Exercise 1
Look at the thermometer below. What temperature does it show?
The red liquid shows 70°F. Is it hot or cold?
Definition:

Thermometer: A tool that measures how hot or cold something is.

Temperature: How hot or cold something feels. We measure it in degrees.

Reading Method:
  1. Look at the red liquid in the thermometer
  2. Find where the red liquid stops
  3. Read the number next to that point
  4. Decide if it's hot or cold
Reading
70°F
Comparison
Warm
Step 1: Identify the red liquid level

The red liquid stops at the 70 mark on the thermometer

Step 2: Read the temperature

The number next to the red liquid is 70°F

Step 3: Compare to normal temperatures

Normal room temperature is about 70°F, so this is warm!

The thermometer shows 70°F (warm)
Final answer:

The thermometer shows 70°F. It is warm/hot.

Applied rules:

• Reading: Always read where the red liquid stops

• Comparison: Room temperature is about 70°F

• Scale: Fahrenheit (°F) is a unit for measuring temperature

Tip: Water freezes at 32°F and boils at 212°F
Tip: Higher numbers mean hotter temperatures
2 Comparing Temperatures
Exercise 2
Which is warmer: 45°F or 60°F? Show your work.
Definition:

Comparing: Looking at two temperatures to see which is higher or lower

Warmer: Having a higher temperature

Colder: Having a lower temperature

Temperature 1
45°F
Temperature 2
60°F
Comparison
60°F > 45°F
Step 1: Write down both temperatures

We have 45°F and 60°F

Step 2: Compare the numbers

60 is bigger than 45, so 60°F is warmer than 45°F

Step 3: Use comparison symbols

60°F > 45°F (60 is greater than 45)

60°F is warmer than 45°F
Final answer:

60°F is warmer than 45°F

Applied rules:

• Comparison: Higher numbers mean warmer temperatures

• Symbols: > means greater than, < means less than

• Units: Both temperatures must have the same unit (°F)

Tip: Think of temperature like stairs - higher numbers are "up" (warmer)
Tip: Always write the unit (°F) with your answer
3 Temperature Changes
Exercise 3
The temperature was 50°F in the morning. It went up 15°F by noon. What was the temperature at noon?
Definition:

Temperature Change: When temperature goes up (gets warmer) or down (gets colder)

Going Up: Adding degrees to make it warmer

Going Down: Subtracting degrees to make it colder

Starting Temp
50°F
Change
+15°F
Final Temp
65°F
Step 1: Identify starting temperature

The temperature in the morning was 50°F

Step 2: Identify the change

It went UP by 15°F, so we add 15°F

Step 3: Add the temperatures

50°F + 15°F = 65°F

Step 4: State the final answer

The temperature at noon was 65°F

50°F + 15°F = 65°F
Final answer:

The temperature at noon was 65°F

Applied rules:

• Addition: When temperature goes up, add the change

• Subtraction: When temperature goes down, subtract the change

• Units: Keep the same unit (°F) in your calculation

Tip: "Went up" means ADD, "went down" means SUBTRACT
Tip: Draw a number line to visualize the change
Temperature Rules and Methods
Hot > Cold
Temperature Comparison
Freezing Point
32°F
Water turns to ice
Boiling Point
212°F
Water turns to steam
Room Temp
~70°F
Comfortable indoors
Hot: Above 80°F - feels warm, may need cooling clothes
Warm: Around 70°F - comfortable, good for outdoor activities
Cool: Around 60°F - may need light jacket
Cold: Below 40°F - needs warm clothes, may snow
32°F
60°F
70°F
80°F
Solution: Exercises 4 to 5
4 Temperature Ordering
Exercise 4
Put these temperatures in order from coldest to warmest:
40°F, 75°F, 30°F, 60°F, 50°F
Definition:

Ordering: Putting numbers in sequence from smallest to largest (ascending) or largest to smallest (descending)

Temps
40°F, 75°F, 30°F, 60°F, 50°F
Ordered
30°F, 40°F, 50°F, 60°F, 75°F
Step 1: List all temperatures

We have: 40°F, 75°F, 30°F, 60°F, 50°F

Step 2: Find the smallest number

30°F is the smallest (coldest)

Step 3: Find the next smallest

40°F is the next smallest

Step 4: Continue ordering

50°F, then 60°F, then 75°F (warmest)

Step 5: Write the final order

30°F, 40°F, 50°F, 60°F, 75°F

30°F, 40°F, 50°F, 60°F, 75°F
Final answer:

From coldest to warmest: 30°F, 40°F, 50°F, 60°F, 75°F

Applied rules:

• Ascending Order: From smallest to largest

• Comparison: Compare each number to find the order

• Verification: Check that each number is smaller than the next

Tip: Circle the smallest number first, then cross it out
Tip: Use a number line to help visualize the order
5 Daily Temperature Problems
Exercise 5
In the morning it was 45°F. During the day it got 20°F warmer. Then at night it got 15°F cooler. What was the temperature at night?
Definition:

Multi-step Problem: A problem that requires more than one operation to solve

Morning
45°F
Got Warmer
+20°F
Got Cooler
-15°F
Night
50°F
Step 1: Start with morning temperature

It was 45°F in the morning

Step 2: Add the warming

During the day it got 20°F warmer: 45°F + 20°F = 65°F

Step 3: Subtract the cooling

At night it got 15°F cooler: 65°F - 15°F = 50°F

Step 4: State the final answer

The temperature at night was 50°F

45°F + 20°F - 15°F = 50°F
Final answer:

The temperature at night was 50°F

Applied rules:

• Sequential Operations: Solve problems in the order events happen

• Addition: When temperature increases

• Subtraction: When temperature decreases

Tip: Write down each step separately to avoid confusion
Tip: Draw a timeline showing temperature changes
Temperature Laws, Methods, and Definitions
Temperature = How Hot or Cold
Temperature Concept
Key definitions:

Temperature: A measure of how hot or cold something is

Thermometer: A tool used to measure temperature

Fahrenheit (°F): A scale for measuring temperature

Complete methodology:
  1. Identify: What temperature are you measuring?
  2. Read: Look at the thermometer correctly
  3. Compare: See if it's hot or cold
  4. Calculate: Add or subtract for changes
Tip 1: Always include the unit (°F) in your answers.
Tip 2: Higher numbers mean warmer temperatures.
Tip 3: Water freezes at 32°F and boils at 212°F.
Tip 4: Normal room temperature is about 70°F.
Common errors: Reading the wrong number on the thermometer, forgetting units, mixing up hot and cold.
Exam preparation: Practice reading thermometers, comparing temperatures, solving word problems.
Important facts to remember:

• Freezing point of water: 32°F

• Boiling point of water: 212°F

• Room temperature: ~70°F

• Body temperature: ~98.6°F

• Weather: 0°F is very cold, 100°F is very hot

Questions & Answers

Question: I don't understand how to read a thermometer. Why does the red liquid go up and down?

Answer: Great question! A thermometer works like this:

  • The red liquid inside is called alcohol or mercury that expands when it gets warm and contracts when it gets cold
  • When it's hot, the liquid expands and moves UP the tube
  • When it's cold, the liquid contracts and moves DOWN the tube
  • The numbers on the side tell us exactly how hot or cold it is

Think of it like a straw with colored liquid - when you blow warm air on it, the liquid moves up, and when you blow cool air, it moves down. The thermometer just measures how much the liquid moved!

Always read the number where the TOP of the red liquid stops!

Question: My child is struggling with temperature comparison. How can I help them understand which is hotter or colder?

Answer: Here are some practical strategies to help your child:

  • Create a number line with temperature examples: 0°F (freezing), 32°F (ice), 70°F (room temp), 100°F (hot)
  • Use real-life examples: "Ice cream is cold (32°F)" vs "Hot chocolate is warm (120°F)"
  • Play comparison games: "Which is warmer: 50°F or 80°F?"
  • Relate to their experiences: "When you feel cold, the temperature is low"

Visual aids work best for young learners. You could draw a thermometer and color-code different temperature ranges (blue for cold, yellow for warm, red for hot). This creates a strong visual connection between numbers and temperature feelings.

Practice with daily temperatures - ask them to compare morning vs afternoon temperatures!

Question: Are there any fun activities I can do at home to reinforce temperature concepts?

Answer: Absolutely! Here are engaging home activities:

  • Weather Journal: Have your child record daily temperatures and note if they felt hot, cold, or comfortable
  • Temperature Hunt: Find items around the house and guess their temperatures (fridge, oven, bath water)
  • Hot/Cold Sorting: Sort pictures of weather conditions into hot or cold categories
  • Thermometer Art: Draw thermometers with different liquid levels for various scenarios

You can also use everyday situations: "The oven is 350°F - that's very hot!" or "The refrigerator is 38°F - that's cold but not freezing!" This connects math to real life.

Cooking together is perfect for temperature learning - measuring ingredients at different temperatures makes it tangible and memorable!