11 questions
Which statement about photosynthesis is true?
the reactants are oxygen and glucose
the products are oxygen and carbon dioxide
the reactants are water and carbon dioxide
the products are glucose and carbon dioxide
If a plant has very large and wide leaves, where would it most likely be found?
in the middle of a field with no trees
on the rainforest floor
at the very top of a tree
in a polar region
Which is not a freshwater ecosystem?
pond
ocean
lake
river
How can a mixture of wood chips and sand be separated?
by density (flotation) - put in water and the wood will float and the sand will sink
by evaporation - put in water and boil - the sand will evaporate
by filter - the sand will go through the filter and the wood chips will stay on top
by magnetism - the sand will be attracted to a magnet, and the wood chips won't
What is the difference between the tundra region and the taiga region?
the tundra has trees and the taiga doesn't
the tundra is very cold and the taiga is hot
the taiga has evergreen trees and the tundra doesn't
the taiga has no plant life at all and the tundra has bushes
How does a tertiary consumer obtain energy?
it breaks down dead plants and animals
it consumes plants
it consumes other consumers
it makes its own food through photosynthesis
Which would be a harmful effect on the ecosystem?
recycling aluminum cans
using reusable water bottles
allowing chemicals like fertilizers and pesticides to runoff into a natural water way
replanting trees after cutting them down
An unknown material has the following properties: high melting point, conductivity, and ductility. What could the material be?
copper
plastic
cotton
wood
Why is a baking a cake a chemical change?
because the properties of the ingredients used are the same before and after the change
because the properties of the ingredients are different before and after the change
because cake is good
because eggs are used
Which of the following is a reversible change?
melting a candy bar
burning a sheet of paper
baking cookies
eating an apple
Which is an example of elastic potential energy?
a rollercoaster at the top of a hill
an apple
a bow and arrow
a book on a bookshelf