6th grade midterm review science

What is a qualitative observation?

Data observed with senses

What is an example of a qualitative observation?

Red string

What is a quantitative observation?

Data focused on numbers

What is an example of quantitative observation?

3 pens

What is an inference?

A Conclusion

What is an example of an inference?

The sun came up in the past so it will tomorrow

Explain what makes a molecule polar?

Pos+ end / Neg- end

Why is water considered a polar molecule?

Pos+ hydrogen / Neg- oxygen

Why does land and air heat and cool at different rates?

Water reflects (high specific heat)Land absorbs (more solar radiation than water)

Explain weathering.

Breaking big rocks into little ones

Give an example of weathering.

Plant roots

Explain chemical weathering.

Rocks broken down by chemical reaction

Give an example of chemical weathering

acid rain

Where is the most fresh water found on earth?What percentage?

Polar ice3%

Where is the most salt water found on earth?What percentage?


Where does most of the pollution go to once it leaves the Chesapeake Bay?

The ocean

What is an estuary

Partially enclosed coastal body of brackish water

What is the largest estuary in the US?

Chesapeake Bay

What is a watershed?

drainage basin

List 4 living factors that affect the watersheds.

People, plants, animals, insects

List 4 non-living factors that affect the watersheds.

Sunlight, oxygen, temperature, soil

What are the functions of wetlands?

control floods, habitat/filter pollution

What tools would a scientist use for the following:1. salinity2. turbidity3.temperature4. pH5. dissolved oxygen

1. salinity -- refractometer2. turbidity -- turbidity tube3.temperature -- thermometer4. pH -- pH probe paper5. dissolved oxygen -- D.O. meter

What does the atomic number tell us?

protons and electrons

What does the symbol tell us?

Name of the element

What does the mass tell us?

Protons and neutrons

--- C6 H12 O6 ---How many elements?How many atomsIllustrate what the molecule will look like.

--- C6 H12 O6 ---How many elements - 3How many atoms - 24

What are the 2 different gasses in the Earths atmosphere?Create a pie chart that displays the different gasses

Nitrogen 78%Oxygen 21%

What is a covalent bond?

sharing of electronsnon-metals

What is an ionic bond?

electrons are transferred from one atom to anotherMetals and non-metals

Explain what a compound, mixture, and element are


What happens during a chemical reaction

one or more substances change into one or more new substances

Illustrate an atom, its particles, and charges