Scientific Notation Worksheets Grade 7

1. Mason is researching the population of a rare species of butterfly. He finds that the current population is approximately 2.7 × 10^5 butterflies. Due to conservation efforts, the population is expected to increase by a factor of 2.2 × 10^2 over the next decade. What will be the expected population of butterflies after the increase? Express your answer in proper scientific notation.
2. Matiu is helping his class with a science project about light pollution. He learns that the city of Auckland, New Zealand, has approximately 1,620,000 residents. Write this number in proper scientific notation.
3. The distance from Earth to the Moon is approximately 384,400,000 meters. Express this distance in scientific notation.

…and 5 more problems

1. (3.6 × 10⁸) ÷ (4.5 × 10⁴) = ?
2. (3.6 × 10⁸) ÷ (4.5 × 10³) = ?
3. Aroha is looking at a scale model of a solar system display in a museum. The model shows the distance from the Sun to Neptune as 4.5 × 10³ millimeters. The actual distance from the Sun to Neptune is 4.5 × 10¹² millimeters. On a separate diagram, the model's scale is represented by a line segment that is 9 millimeters long, labeled with the actual distance it represents. What actual distance, in millimeters, does that 9-millimeter line segment represent? Express your answer in scientific notation.

…and 3 more problems

1. Mason is studying the world's oceans for a science project. He learns that the Pacific Ocean contains approximately 6.6 × 10^8 cubic kilometers of water, while the Atlantic Ocean contains about 3.1 × 10^8 cubic kilometers of water. What is the total volume of water in both oceans combined? Express your answer in proper scientific notation.
2. Mere is helping her class learn about the distances to nearby stars. She reads that the star Alpha Centauri A is approximately 4.37 × 10^13 kilometers from Earth, and the star Sirius is approximately 8.61 × 10^13 kilometers from Earth. What is the combined distance from Earth to both stars? Express your answer in proper scientific notation.
3. A research lab is studying bacterial growth. They observe that a particular colony doubles in size every 3 hours. If the colony starts with 8,000 bacteria, how many bacteria will there be after 12 hours?

…and 4 more problems