GRADE 6 Science QUIZ

Blessy has two substances:
• a colourless solution called vinegar

• a white solid called washing soda.
Blessy adds vinegar to some washing soda.

A chemical reaction takes place.

Carbon dioxide gas and liquid water are made. A solution of sodium ethanoate is also made.
Identify the REACTANTS in the above chemical reaction.

• vinegar and washing soda

• vinegar and carbon dioxide

• water and carbon dioxide

• carbon dioxide, water and sodium ethanoate

Blessy has two substances:
• a colourless solution called vinegar

• a white solid called washing soda.
Blessy adds vinegar to some washing soda.

A chemical reaction takes place.

Carbon dioxide gas and liquid water are made. A solution of sodium ethanoate is also made.
Identify the PRODUCTS in the above chemical reaction.

• vinegar and washing soda

• vinegar and carbon dioxide

• water and carbon dioxide

• carbon dioxide, water and sodium ethanoate

Priya investigates pulse rate and exercise. Pulse rate is the number of times the heart beats in a minute.
• step 1 – measures her normal (resting) pulse rate

• step 2 – runs 100 m as fast as possible

• step 3 – immediately measures her pulse rate

• step 4 – rests until her pulse rate goes back to normal

• step 5 – repeats steps 1 to 4

• step 6 – repeats the investigation with some of her friends

• step 7 – looks at her results to make a conclusion.
Which step involves fair testing?

• 1

• 2

• 3

Priya investigates pulse rate and exercise. Pulse rate is the number of times the heart beats in a minute.
• step 1 – measures her normal (resting) pulse rate

• step 2 – runs 100 m as fast as possible

• step 3 – immediately measures her pulse rate

• step 4 – rests until her pulse rate goes back to normal

• step 5 – repeats steps 1 to 4

• step 6 – repeats the investigation with some of her friends

• step 7 – looks at her results to make a conclusion.
Which step involves PATTERN SEEKING?

• 2

• 4

• 5

• 6

• 7

Priya investigates pulse rate and exercise. Pulse rate is the number of times the heart beats in a minute.
• step 1 – measures her normal (resting) pulse rate

• step 2 – runs 100 m as fast as possible

• step 3 – immediately measures her pulse rate

• step 4 – rests until her pulse rate goes back to normal

• step 5 – repeats steps 1 to 4

• step 6 – repeats the investigation with some of her friends

• step 7 – looks at her results to make a conclusion.
Which step improves the reliability of the data collected by Priya?

• 2

• 4

• 5

• 7