Why would the total mass of the product(s) would be less than the total weight of the reactant(s) after a chemical reaction?
a gas was released
100
What part of the plant cell is known as the "powerhouse"?
mitochondria
100
Why are ice cores important to the study of geologic history?
They contain evidence showing changes in the atmospheric composition over time.
100
What will most likely result if there is increased upwelling in a coastal area?
more aquatic life due to increased nutrients
100
Is Lyme Disease caused by bacteria, virus, protist or fungi?
bacteria
200
If a chemical reaction such as photosynthesis begins with 6 atoms of carbon (C), how many atoms of carbon (C) should be in the products?
6 Carbon atoms
200
This part of the cell breaks down sugar to produce energy for the cell.
mitochondria
200
Describe the Law of Superposition.
In undisturbed layers of sedimentary rock, the lowest layers contain the older rocks.
200
Does water hold more dissolved oxygen when it is warmer or colder?
colder
200
Which feature do protists, fungi, plants, and animals share but bacteria lack?
nucleus
300
The smallest particle into which an element can be divided and still have the properties of that element is
called a(n)
atom
300
Which organelle is the site of protein synthesis?
ribosomes
300
As time goes by, and water goes through the water cycle again and again, the amount of water on Earth _______.
A. Increases
B. Decreases
C. Stays the same
D. Goes up and down
c. stays the same
300
Is influenza a bacteria, virus, protist or fungi?
Virus
400
Every atom of a given element has the same number of
protons
400
What are 2 of the 3 structures in plant cells but not animal cells?
cell wall, chloroplasts, large central vacole
400
How do scientists know that some mountains were once at the bottom of an ocean?
Marine fossils have been found on the peaks of some mountains.
400
In the United States, which agency is responsible for ensuring the safety of the country’s drinking water?
Environmental Protection Agency (EPA)
400
Malaria is a common disease in many countries. What is the cause of this disease?
mosquito
500
A carbon atom with 6 protons, 6 electrons, and 6 neutrons would have an atomic number of
6
500
Relative to prokaryotic cells, eukaryotic cells are usually larger / smaller and more complex / less complex ?
larger and more complex
500
What process is most responsible for the extinction of most species of plants and animals that have lived on Earth?
environmental changes
500
Where does most of the evaporation of water on Earth take place?