SEP 2 and 3 Review

A simple machine that allows you to test your design.

• solution
• design
• prototype
• iterative process

Tags

NGSS.MS-ETS1-3

NGSS.MS-ETS1-4

Once you've figured out what problem you want to tackle, you need to _____

• do your research
• design your solution
• build a prototype
• test your solution

Tags

NGSS.MS-ETS1-1

A method of coming up with alternative solutions.

• Brainstorming
• Probability
• Variable
• Iterations

Tags

NGSS.MS-ETS1-4

A student planned a scientific inquiry to observe and record how many species of birds visit a bird feeder in one day. This is an example of which type of scientific investigation?

• experimental

• comparative

• controlled

• descriptive

The engineering design process involves several steps. Which step occurs at the start of the engineering design process?

• Identify criteria and constraints.

• Identify a problem or need.

• Make a cost-benefit analysis.

• Test and evaluate solutions.

What precautions should you take if a lab procedure has this symbol?

• Avoid exposing the chemical to flames and heat.

• Avoid skin or eye contact with this material.

• Be sure there is good ventilation and never smell fumes directly.

• Wear goggles, gloves, and an apron.

Two students noticed that when their family's pet lizard sat in bright sunlight, the lizard's body turned from orange to black. What are some questions that the students could ask to investigate their observation?

Select ALL the correct responses

• Is this species of lizard known to change color?

• Do lizards need sunlight?

• If the pet lizard sits in the shade, will its body turn orange?

• Do some colors absorb more energy from sunlight than others?

A group of students set up a system to filter sand from water. The equipment that they used is shown in the diagram. Why did the students use the item labeled D?

Select ALL that apply.

• to collect the filtered water

• to separate the sand from the water

• to measure the volume of filtered water

• to hold the filter paper

A student drew the model below. To which question does the model provide an answer?

• What happens when table salt dissolves in water?

• What causes water molecules to move?

• Will more table salt dissolve in hot water than in cold water?

• Can oil dissolve in water?

Tags

NGSS.MS-PS1-2

In the chemical reaction 2 Na(s) + Cl2(g) → 2NaCl(s)2 Nas + Cl2g → 2NaCls, the metal sodium (Na)Na and chlorine (Cl2)Cl2 gas react to produce solid sodium chloride (NaCl),NaCl, or table salt. In this reaction, Na and Cl2Cl2 are the reactants, and NaClNaCl is the product. It has been repeatedly observed that the sum of the masses of Na and Cl2Cl2 reacting equals the mass of NaClNaCl produced. In fact, this phenomenon has been observed for every chemical reaction to date since the scientist Lavoisier first observed it in 1789. In chemical reactions, the total mass of the reactants always equals the total mass of the products. This phenomenon is referred to generally as the conservation of mass. What is this phenomenon considered?

• a theory

• a law

• a hypothesis

• an idea

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5