Significant Figures and Calculations Quiz

Mason, Anika, and Michael are working on a science project where they have to measure the weight of a small pebble. They use a highly sensitive scale and get the weight as 0.00345 grams. Can you help them identify the number of significant figures in this measurement?

• 4

• 5

• 3

• 2

Rohan is counting the number of books in a library. He counted 5000 books. Identify the number of significant figures in the number of books counted by Rohan.

• 3

• 5

• 2

• 4

Zoe is working on a science experiment and she measures a quantity as 0.00876. If she wants to round this number to 2 significant figures, what would it be?

• 0.008

• 0.0088

• 0.009

• 0.0087

Aria has 4500 seeds for her garden. If she wants to round this number to 2 significant figures, how many seeds would she have?

• 5000

• 4600

• 4500

• 4000

Aiden bought 3.45 kg of apples and Grace bought 2.1 kg of apples. What is the total weight of apples they bought together (rounded to the correct number of significant figures)?

• 5.6 kg

• 3.0 kg

• 5.0 kg

• 6.0 kg

Emma, Noah, and Mason are playing a game. Emma has 6.789 points and Noah takes away 3.2 points from her. How many points does Emma have now with the correct number of significant figures?

• 3.5

• 3.6

• 2.5

• 9.0

Grace is baking a cake and needs to multiply the quantities of two ingredients: 2.3 cups of flour and 4.56 cups of sugar. What is the correct multiplication of these two quantities with the correct number of significant figures?

• 8.28

• 0.105

• 46.8

• 10.5

Charlotte is baking a cake and needs to divide 8.91 cups of flour into 2.0 equal parts for two different recipes. How many cups of flour will each recipe get, considering the correct number of significant figures?

• 6.0 cups

• 2.5 cups

• 3.5 cups

• 4.5 cups

Noah, Emma, and Maya are studying for a science quiz. They come across a question that asks them to convert the weight of a certain bacteria, which is 0.000045 grams, into scientific notation. How would they write this weight in scientific notation?

• 4.5 x 10^-4

• 4.5 x 10^-6

• 4.5 x 10^-3

• 4.5 x 10^-5

Ava is studying astronomy and she comes across a star that is 6.72 x 10^4 light years away. How would she express this distance in standard form?

• 6.72 x 10^3 light years

• 6.72 x 10^4 light years

• 6.72 x 10^5 light years

• 6.72 x 10^-4 light years