atoms
What are the three states of matter?
Solid
Liquid
Gas
Name the 4 levels of an ecosystem and the definition of each
organism > population > community > Ecosystem
describe the difference between unicellular and multicellular
unicellular organisms survive as one single cell while multicellular organisms are made of many cells working together to keep the organism alive
What two tides do we have on Earth and describe the positions of the sun Earth and moon during each
Neap- sun Earth and moon are at a 90 degree angle
Spring- sun Earth and moon are in a straight line
If you add oil and water to a container, which one will float, which one will sink and why?
oil will float on top because it is less dense than the water
Which state of matter has the most kinetic energy and why?
Gas; the particles have the most room to move around
What are biotic and abiotic factors
biotic - living or once living
abiotic - non living
Who was the first person to look at cells under a microscope and name them
Robert Hooke
Which tide will have the biggest difference between high and low tide?
When two substances were mixed, fire smoke and gas bubbles were produced. What type of change occurred?
Chemical change
What is kinetic energy?
The energy of motion
How is an ecosystem different from a community?
A community is different populations living in the same area while ecosystems include the community AND abiotic factors
Which of the following characteristics best proves a cell is Prokaryotic:
lack a nucleus
unicellular
asexual reproduction
autotrophic and heterotrophic
Lack a nucleus
Which element classification are poor conductors?
Nonmetals
If the Earth was not tilted on its axis what effect would that have on the Earth?
No changes in seasons
Which statement correctly describes both gases and liquids?
Their volumes change when they are in different containers.
Their shapes change when they are in different containers.
Their shapes remain the same in any container.
Their volumes stay the same in any container.
Their shapes change when they are in different containers.
Water hyacinth plants are classified as an invasive species in most states. The plants grow on top of water and form a thick mass, quickly covering the surface of ponds or rivers.
Which of the following statements BEST predicts what will happen when the water hyacinth plant enters an ecosystem?
-Other aquatic plant species will have less available sunlight.
-Other aquatic plant species will have more available sunlight.
-Other aquatic plant species will have less available sunlight.
What is the main difference between prokaryotic and eukaryotic cells?
Eukaryotic cells have a nucleus while prokaryotic cells do not
Which of the following correctly describes the properties of metals as compared to nonmetals?
Metals possess greater conductivity and greater malleability than nonmetals.
Metals possess greater conductivity and less ductile than nonmetals.
Metals possess less malleability and greater conductivity than nonmetals.
Metals possess lower conductivity and less metallic appearance than nonmetals.
Metals possess greater conductivity and greater malleability than nonmetals.
What are the 4 spheres and what do they include
Bio- life
Atmos- gas and air
Hydro- water
geo- solid Earth/ layers of the earth
baking a cake, popping popcorn and a nail rusting are all examples of what type of change?
Chemical
Which level of ecosystem is made up of different populations living in the same area?
Community
What is the cell theory? (Where do cells come from)
Cells come from pre existing cells
is boiling water a physical or chemical change and why?
Physical change bc it is a state change from liquid to gas
They also listed a salad dressing with bits of herbs floating around as heterogeneous.
Which example is wrong?
Salt water; it is homogeneous because it all looks the same when the salt is dissolved