Physics Pre-Assessment

Stephen predicted that seeds would start to grow faster if an electric current traveled through the soil in which they were planted.  
Which step of the scientific method is this?

• Stating the problem
• Forming a hypothesis
• Conducting an experiment
• Drawing a  conclusion

The second energy level can hold up to how many electrons?

• 2
• 8
• 10
• 12

All matter is made of _________. 

• energy 
• atoms 
• electrons 
• compounds 

Tags

NGSS.MS-PS1-1

How do you find out the number of neutrons in an atom?

• atomic number
• atomic mass
• charge
• atomic mass - atomic number

The part of the atom that determines the identity of the atom is the ____________.

• proton
• nucleus
• electron
• neutron

Which end of the water molecule has a slightly positive charge?

• the oxygen end
• the hydrogen end
• both ends are slightly positive
• neither end is positive

Water is a universal solvent because it...

• It can be found anywhere
• It freezes when it gets cold
• floats when frozen
• Dissolves most substances

A water molecule has the chemical formula H2O. This means that the water molecule is made up of

• Two hydrogen atoms and one oxygen atom

• Two oxygen atoms and one hydrogen atom

• Two hydrogen atoms and two oxygen atoms

• Two molecules of water

Tags

NGSS.MS-PS1-1

Cohesive means ........

• the water molecules stick to each other

• the water molecules stick to other surfaces

• the water molecules are less dense

• the water molecules are far apart

Adhesive means ........

• the water molecules stick to each other

• the water molecules stick to other surfaces

• the water molecules are less dense

• the water molecules are far apart