The following diagram shows an experiment to investigate the heat conductivity of three rods made of different metals. A cork is attached on each rod by was. The results of the experiment are shown in the following table Type of rod Time taken for the cork to drop Steel 63 s Copper 32 s Brass 45 s Which type of rod is a pure substance? Explain.

Copper rod is made up of pure copper. Metals are good conductors of heat. Adding impurities lessens conductivity. Since copper rod takes less time to conduct, the material should be pure.

E M B I B E

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>WORKSHEET

Archana Shukla Solutions for Chapter: Heat and Temperature, Exercise 9: WORKSHEET

Author:Archana Shukla

Archana Shukla Science Solutions for Exercise - Archana Shukla Solutions for Chapter: Heat and Temperature, Exercise 9: WORKSHEET

Attempt the free practice questions on Chapter 2: Heat and Temperature, Exercise 9: WORKSHEET with hints and solutions to strengthen your understanding. WOW! SCIENCE Hands-on Learning in SCIENCE 7 solutions are prepared by Experienced Embibe Experts.

Questions from Archana Shukla Solutions for Chapter: Heat and Temperature, Exercise 9: WORKSHEET with Hints & Solutions

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>WORKSHEET>Q a)

The following diagram shows an experiment to investigate the heat conductivity of three rods made of different metals. A cork is attached on each rod by was.

Question Image

The results of the experiment are shown in the following table

Type of rod	Time taken for the cork to drop
Steel	$63 s$
Copper	$32 s$
Brass	$45 s$

Which type of rod is a pure substance? Explain.

EASY

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>WORKSHEET>Q b)

The following diagram shows an experiment to investigate the heat conductivity of three rods made of different metals. A cork is attached on each rod by was.

Question Image

The results of the experiment are shown in the following table

Type of rod	Time taken for the cork to drop
Steel	$63 s$
Copper	$32 s$
Brass	$45 s$

Arrange, in an increasing order, the ability of heat conduction of these three materials.

EASY

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>WORKSHEET>Q c)

The following diagram shows an experiment to investigate the heat conductivity of three rods made of different metals. A cork is attached on each rod by was.

Question Image

The results of the experiment are shown in the following table

Type of rod	Time taken for the cork to drop
Steel	$63 s$
Copper	$32 s$
Brass	$45 s$

From the results, what conclusion can you make about the heat conductivity of different metals?

MEDIUM

7th CBSE

IMPORTANT

WOW! SCIENCE Hands-on Learning in SCIENCE 7>Chapter 2 - Heat and Temperature>WORKSHEET>Q d)

The following diagram shows an experiment to investigate the heat conductivity of three rods made of different metals. A cork is attached on each rod by was.

Question Image