two part question
running water can cause two things to happen to a river. What two parts of weathering are caused by a river
erosion and deposition due to running water.
list factors that affect the rate of weathering.
hot and wet climate increases weathering cold and dry climate decreases weathering,decreased surface area decreases weathering increase in acid rain increases weathering.
what substances can rust?
water,oxygen,iron
what is mass?
the amount of matter in an object.
what do we call the force of attraction that holds atom together in a compound?
chemical bond.
what are two types of weathering? List the causes of these two types of weathering.
chemical:carbonic acid,water,other acid
physical:organic activity,wind,waves,running water,gravity
what is mass wasting?
moving rocks from high elavations to low elavations.
what is the main factor that causes landslides?
Gravity
how man grams in one kilogram?
1,000
give 5 example of elements.
copper,oxygen,hydrogen,carbon,iron
what is the main cause of soil erosion?How can we try to prevent this?
wind. farmer using wind breaks like trees,to slow down the wind.
when cooking pasta,what separation technique is used to separate the pasta from the water?
filtration pasta stays in the strainer and water passes through.
what is a moraine?
formed glacier deposition.
which property tells us whether an object will sink or float.
density
fossil fuels are formed from the remains of ancient organisms.name 3 types and their states of matter.
oil-liquid,natural gas-gas,coal-solid.
what is climate change?what can climate change do to our ecosystem.
change in climate or long term weather patterns. it can disrupt ecosystems by making organism less adapted to the environment.
is each of the following a chemical,physical or intrinsic property?
yes
what is a U-shaped valley
land form formed by glacial erosion.
give to examples of homogeneous mixtures.
salt and water. water and sugar.
in the second example above,which letters are most likely pure substances? how many substances in X
A,B,D (only in one dot). 3
what are the units for volume? what are the units for density?
milliliters . g/cm3
what elements make up a molecule of salt? What elements make up a molecule of sugar?
soduim chlorine. carbon hydrogen,oxygen.
what is a glacier?
large mass of moving ice.
what do we call the universal solvent.
water
draw the atoms and chemical bonds in the following molcules: water,methane,hydrogen peroxide.
H
O C O H
H H / H H / H O
H