Math 7 Lesson 1-2 part 1

1. A salad dressing calls for 3 parts oil and 1 part vinegar. Manuela uses 2 tablespoons of vinegar and 6 tablespoons of oil to make her salad dressing.

• Yes, both have a ratio of 2:3

• Yes, both have a ratio of 3:1

• Yes, both have a ratio of 1:2

• No, they have different ratios

2. A specific shade of orange paint calls for 2 parts yellow and 3 parts red. Catie uses 3 cups of yellow paint and 4 cups of red paint to make orange paint.

• Yes, both have a ratio of 2:3

• Yes, both have a ratio of 3:4

• Yes, both have a ratio of 1:2

• No, they have different ratios

3. A saltwater solution for an aquarium calls for 35 parts salt to 1000 parts water. Tareq used 7 tablespoons of salt and 200 tablespoons of water.

• Yes, both have a ratio of 7:200

• Yes, both have a ratio of 35:7

• Yes, both have a ratio of 7:1000

• No, they have different ratios

4. A conveyor belt moves at a constant rate of 12 feet in 3 seconds. A second conveyor belt moves 16 feet in 4 seconds.

• Yes, both have a ratio of 3:4

• Yes, both have a ratio of 12:16

• Yes, both have a ratio of 4:1

• No, they have different ratios

5. A tectonic plate in Earth’s crust moves at a constant rate of 4 centimeters per year. In a different part of the world, another tectonic plate moves at a constant rate of 30 centimeters in ten years.

• Yes, both have a ratio of 4:1

• Yes, both have a ratio of 30:10

• Yes, both have a ratio of 3:1

• No, they have different ratios

6. A strand of hair grows at a constant rate of inch per month. A different strand of hair grows at a constant rate of 4 inches per year.

• Yes, they have the same ratio of 1/2 inch per month

• Yes, they have the same ratio of 1/3 inch per month.

• No, one ratio is 1/2 inch per month and the other is 1/3 inch per month.

One blend of garden soil is 1 part minerals, 1 part peat moss, and 2 parts compost. Select all of the mixtures below that are in a proportional relationship with this blend. (Last choice in book is not on quiz. It was NOT proportional.)

• 5 ft³ minerals, 5 ft³ peat moss, 10 ft³ compost

• 10 ft³ minerals, 15 ft³ peat moss, 15 ft³ compost

• 12 ft³ minerals, 12 ft³ peat moss, 24 ft³ compost

• 20 ft³ minerals, 20 ft³ peat moss, 40 ft³ compost

• 100 ft³ minerals, 100 ft³ peat moss, 200 ft³ compost