Grade 7 asset practice

The figure below shows a diagrammatic representation of molecules of two different gases kept in either side of a tap.

The tap is open, which of the following diagrams would represent BEST the diagram after sometime?

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Tags

NGSS.MS-PS3-1

NGSS.MS-PS3-4

Manu wanted to find out if his heartbeat rate changed after he ran. These are the things he recorded. Which of them is NOT required for him to find the answer?

 

• the number of heartbeats per minute before running

• the number of heartbeats per minute immediately after running

• his body temperature after running

• all the above three are required.

Shown alongside is a pendulum clock. What are the different types of motion that you would observe in such a clock?

• rectilinear motion & circular motion

• circular motion & oscillatory motion

• oscillatory motion & rectilinear motion

• rectilinear, oscillatory & circular motion

In the diagram below Circle P represents compounds/mixtures that contain oxygen and are edible and Circle Q represents compounds/mixtures that contain both hydrogen and oxygen. In the region R, the region of intersection of circles P and Q, which of the following can be placed?

• washing Powder

• sugar

• wax

• common Salt

Tags

NGSS.MS-PS1-1

The structure shown here is called a greenhouse. Greenhouses have glass panels that let in light but keep heat from escaping. In which regions would greenhouses of this type be used to grow plants?

• regions that are very cold

• regions that are very hot

• regions that are very humid

• regions that are very dry

Tags

NGSS.MS-LS1-6

When solid candle wax is heated, it becomes liquid. The molecules

 

• absorb heat & move apart

• absorb heat & come together

• release heat & move apart

• release heat & come together

Tags

NGSS.MS-PS1-4

Given below are the ball-and-stick models of a few molecules. Which one of them represents a water molecule?

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Tags

NGSS.MS-PS1-1

Which gas will you fill in the empty bubble here?

• A. Nitrogen

• B. Oxygen

• C. Carbon dioxide

• D. Water vapour

Tags

NGSS.MS-LS1-6

Adil arranges a circuit using five interconnected rings as shown in the figure. The bulb glows in this arrangement

Which ring(s) should Adil remove from the arrangement to stop the bulb glowing?

 

• only ring 2

• both rings 2 & 4

• both rings 4 & 5

• any one of these rings 2, 4 & 5

Which one of the following can neutralize acids

      

• Mg(OH)₂

   

• NaHCO₃

• HCL

• Both (A) and (B)