PMA1 Review - 2

What is an observation?

• A scientific statement based on ideas

• Using your senses to notice what is going on around you

• To be unaware of your surroundings

• The question that you want an answer to.

Tags

CCSS.RI.1.4

CCSS.RI.2.1

CCSS.RI.3.1

CCSS.RL.2.1

CCSS.RL.3.1

In order to be accepted, a scientific theory must be

•  widely tested and supported by extensive data
•  based on the results of a single experiment
•  controversial and cause debate
•  in line with all previous historical ideas

Tags

NGSS.MS-LS2-4

Mr. S normally uses praise as a reward to train his dog. He wants to know the best way to train his dog, so he sets up an experiment to find out if there is a better way to get his dog to respond to commands. What is his dependent variable?

• Type of reward
• Praise
• Type of dog
• Amount of time the dog follows commands

 Which of the following statements is a testable? 

• Ghosts are real. 
• Eating fish reduces the chance of having a stroke. 
• Walking under a ladder causes bad luck.
• Smoking makes people less attractive.

Which statement best describes an effect of the low density of frozen water on a lake?

• When water freezes it contracts, decreasing the water level in the lake.
• Water in a lake freezes from the bottom up
• Water removes thermal energy from the land, causing the lake to freeze
• When water in a lake freezes, it floats and provides insulation for the organisms below

Tags

NGSS.MS-LS2-4

A water molecule is polar. Its bent shape results in the following...

• slightly positive charge on hydrogen and slightly negative charge on oxygen
• slightly positive charge on hydrogen and slightly  positive charge on oxygen
• slightly negative charge on hydrogen and slightly positive charge on oxygen
• no change because its neutral

What unique feature of water is being shown?

• cohesion

• adhesion

• polarity

• freezing point

Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?

• Water expands as it freezes.
• Water is an excellent solvent.
• Water exhibits cohesive behavior.
• Water is able to moderate temperature.

Why does ice stay at the top of oceans instead of sinking to the bottom?

•  Ice is colder than liquid water.
• Ice is less dense than liquid water.
• Ice is more dense than liquid water.
• Ice is warmer than liquid water.

Tags

NGSS.MS-PS1-4

Water makes up approximately 60% of the human body and plays a vital role in regulating body temperature. Which property of water makes it good at regulating temperature?

• Water is a good solvent.
• Water exhibits strong cohesion.
• . Water has an unusual crystalline structure.
• Water has a high capacity for heat.

Tags

NGSS.MS-PS1-4