Question 1:
What is meant by scientific method?
Answer:
Scientific method is a systematic method used by scientists and researchers when solving problems in science.
What is meant by scientific method?
Answer:
Scientific method is a systematic method used by scientists and researchers when solving problems in science.
Question 2:
Why is a scientific method important in chemistry? State your opinion.
Answer:
Scientific method helps chemists to solve problems through systematic scientific steps.
Why is a scientific method important in chemistry? State your opinion.
Answer:
Scientific method helps chemists to solve problems through systematic scientific steps.
Question 3:
You are given a bucket of ice cubes, a little sugar, a measuring cylinder and a stopwatch.
Plan an experiment to determine whether sugar increases the melting rate of the ice.
Answer:
(Student’s suitable answer)
Hypothesis: The addition of sugar will increase the rate of melting of ice
Manipulated variable: Mass of sugar used
Responding variable: Rate of melting of ice
Fixed variable: Surrounding temperature, type of sugar used, mass of ice
Procedure:
1. Weigh 200 g ice and put in a small pail.
2. Put the small pail in a shaded place for 5 minutes.
3. After 5 minutes, use a measuring cylinder to measure the volume of water formed in the pail.
4. Record the reading in a table.
5. Repeat steps 1 to 4 by adding 10 g, 30 g and 50 g sugar.
You are given a bucket of ice cubes, a little sugar, a measuring cylinder and a stopwatch.
Plan an experiment to determine whether sugar increases the melting rate of the ice.
Answer:
(Student’s suitable answer)
Hypothesis: The addition of sugar will increase the rate of melting of ice
Manipulated variable: Mass of sugar used
Responding variable: Rate of melting of ice
Fixed variable: Surrounding temperature, type of sugar used, mass of ice
Procedure:
1. Weigh 200 g ice and put in a small pail.
2. Put the small pail in a shaded place for 5 minutes.
3. After 5 minutes, use a measuring cylinder to measure the volume of water formed in the pail.
4. Record the reading in a table.
5. Repeat steps 1 to 4 by adding 10 g, 30 g and 50 g sugar.