Little Learnersplay. practice. discover.
Explore

Grade 6 · Science

Choose a material within design constraints

Use performance, mass and cost data to choose a material that meets a defined need.

6 authored questions + worked example

Play this skill Make a practice check

Worked example

Material A: tested load 14 N; mass 7 g; cost 5 tokens. Material B: tested load 16 N; mass 10 g; cost 4 tokens. Material C: tested load 10 N; mass 5 g; cost 3 tokens.

A model needs a material tested for at least 12 N while weighing no more than 8 g. Which listed material has the lowest cost among those meeting both limits?

Answer & why

Answer: Material A

First remove materials failing either limit. Material A has the lowest stated cost among the remaining options.

Add to plan

All questions

All 6 authored questions for this skill.

Question 1

Material A: tested load 9 N; mass 4 g; cost 2 tokens. Material B: tested load 12 N; mass 5 g; cost 4 tokens. Material C: tested load 14 N; mass 8 g; cost 3 tokens.

A model needs a material tested for at least 10 N while weighing no more than 6 g. Which listed material has the lowest cost among those meeting both limits?

  1. Material A
  2. Material C
  3. Ignore the mass limit.
  4. Material B
A hint

Check every constraint before comparing cost.

Answer & why

Answer: Material B

First remove materials failing either limit. Material B has the lowest stated cost among the remaining options.

Add to plan

Question 2

Material A: tested load 20 N; mass 12 g; cost 4 tokens. Material B: tested load 16 N; mass 8 g; cost 3 tokens. Material C: tested load 19 N; mass 9 g; cost 6 tokens.

A model needs a material tested for at least 18 N while weighing no more than 10 g. Which listed material has the lowest cost among those meeting both limits?

  1. Material A
  2. Material C
  3. Ignore the mass limit.
  4. Material B
A hint

Check every constraint before comparing cost.

Answer & why

Answer: Material C

First remove materials failing either limit. Material C has the lowest stated cost among the remaining options.

Add to plan

Question 3

Material A: tested load 15 N; mass 6 g; cost 5 tokens. Material B: tested load 17 N; mass 9 g; cost 4 tokens. Material C: tested load 13 N; mass 4 g; cost 2 tokens.

A model needs a material tested for at least 14 N while weighing no more than 7 g. Which listed material has the lowest cost among those meeting both limits?

  1. Material B
  2. Ignore the mass limit.
  3. Material C
  4. Material A
A hint

Check every constraint before comparing cost.

Answer & why

Answer: Material A

First remove materials failing either limit. Material A has the lowest stated cost among the remaining options.

Add to plan

Question 4

Material A: tested load 12 N; mass 7 g; cost 3 tokens. Material B: tested load 14 N; mass 6 g; cost 5 tokens. Material C: tested load 10 N; mass 5 g; cost 2 tokens.

A model needs a material tested for at least 11 N while weighing no more than 8 g. Which listed material has the lowest cost among those meeting both limits?

  1. Material A
  2. Material C
  3. Material B
  4. Ignore the mass limit.
A hint

Check every constraint before comparing cost.

Answer & why

Answer: Material A

First remove materials failing either limit. Material A has the lowest stated cost among the remaining options.

Add to plan

Question 5

Material A: tested load 14 N; mass 7 g; cost 5 tokens. Material B: tested load 16 N; mass 10 g; cost 4 tokens. Material C: tested load 10 N; mass 5 g; cost 3 tokens.

A model needs a material tested for at least 12 N while weighing no more than 8 g. Which listed material has the lowest cost among those meeting both limits?

  1. Ignore the mass limit.
  2. Material A
  3. Material B
  4. Material C
A hint

Check every constraint before comparing cost.

Answer & why

Answer: Material A

First remove materials failing either limit. Material A has the lowest stated cost among the remaining options.

Add to plan

Question 6

Material A: tested load 17 N; mass 8 g; cost 6 tokens. Material B: tested load 14 N; mass 6 g; cost 4 tokens. Material C: tested load 18 N; mass 11 g; cost 5 tokens.

A model needs a material tested for at least 15 N while weighing no more than 9 g. Which listed material has the lowest cost among those meeting both limits?

  1. Material A
  2. Material B
  3. Material C
  4. Ignore the mass limit.
A hint

Check every constraint before comparing cost.

Answer & why

Answer: Material A

First remove materials failing either limit. Material A has the lowest stated cost among the remaining options.

Add to plan