This Grade 4 worksheet challenges students to compare wave speed in different mediums. Learners discover that sound travels faster through water than air, faster still through solids, and that light always travels faster than sound, which is why we see lightning before we hear thunder. Through fill-in-the-blanks and a matching activity, Grade 4 students practice using terms like medium, vacuum, transmission, and signal in clear scientific sentences.
Style:
Waves: Light and Sound
Part A: Fill in the Blank
Write the missing word or number on each line.
1. In Grade 4 science, light always travels faster than sound in air.
2. Grade 4 fact: sound waves travel faster through water than they do through air.
3. We see lightning before we hear thunder because the light reaches our eyes first in Grade 4 lessons.
4. The material a wave moves through is called the medium in Grade 4 science.
5. Sound waves cannot travel through empty space, but light waves can in Grade 4 class.
6. Sound usually travels faster through solids than through liquids in Grade 4 textbooks.
7. Counting seconds between lightning and thunder helps you guess how far the storm is in Grade 4.
8. The path of energy from a source to your senses can be called a signal in Grade 4 science.
9. Sending a wave from one place to another is called transmission in Grade 4 lessons.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Grade 4: sound speed in air vs water
→ Faster in water
Faster in water
Grade 4: lightning then thunder
→ Light arrives first
Light arrives first
Grade 4: medium
→ Material a wave moves through
Material a wave moves through
Grade 4: vacuum of space
→ Sound cannot travel here
Sound cannot travel here
Waves: Light and Sound
★ Part A: Fill in the Blank
Write the missing word or number on each line.
1) In Grade 4 science, light always travels faster than sound in air.
2) Grade 4 fact: sound waves travel faster through water than they do through air.
3) We see lightning before we hear thunder because the light reaches our eyes first in Grade 4 lessons.
4) The material a wave moves through is called the medium in Grade 4 science.
5) Sound waves cannot travel through empty space, but light waves can in Grade 4 class.
6) Sound usually travels faster through solids than through liquids in Grade 4 textbooks.
7) Counting seconds between lightning and thunder helps you guess how far the storm is in Grade 4.
8) The path of energy from a source to your senses can be called a signal in Grade 4 science.
9) Sending a wave from one place to another is called transmission in Grade 4 lessons.
★ Part B: Matching
Match each item on the left to the correct answer on the right.
1) Match each item to its correct answer.
Grade 4: sound speed in air vs water
→ Faster in water
Faster in water
Grade 4: lightning then thunder
→ Light arrives first
Light arrives first
Grade 4: medium
→ Material a wave moves through
Material a wave moves through
Grade 4: vacuum of space
→ Sound cannot travel here
Sound cannot travel here
Ready to Practice?
Complete each section carefully.
10 Questions
10-15 minutes
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