Nature of Science
What are explanations of scientific events that may change based on continuous research?
theories
What is a substance made of 2 or more different atoms, such as H2O?
compound
When a burning candle's wax melts, then gets dropped into cold water, how can you describe the change in states of matter?
liquid to a solid
What do plants make for the world?
oxygen
What are cooler and darker spots on the sun called?
What word means energy from the sun heats the ocean's and land's surfaces?
sunspots
radiation
What variable is used in a scientific experiment to compare the results to the tested independent variable?
control group
Atoms are made of particles--protons, neutrons, and electrons. What type of charge do NEUTRONS have?
none
If one substance dissolves at 20 degrees C and another substance dissolves at 30 degrees C, then both of these substances are ________________.
soluble
The law of conservation of mass and matter states that mass and matter
cannot be created or destroyed
How do you describe what convection currents are in stars AND is the Earth's mantle?
Throughout history, scientific knowledge has changed. Did the discovery of the DNA molecule change scientific knowledge?
yes
All elements in the same group/family have______
similar properties
If students are pouring vegetable oil, water, and syrup into a graduated cylinder, what are the likely measuring?
density
What part of the cell does all the parts of plants have that animals don't?
cell wall
If a space probe lands on a planet with half the gravity of Earth, how can you describe the effect on mass and weight? mass-- weight--
mass-stays the same
weight-less
What best provides support for a testable scientific hypothesis?
evidence/observations
What gives EACH element its own identity?
number of protons/atomic number
If a substance is heated to a higher temperature during a chemical reaction, what would happen to the rate of the chemical reaction?
It would increase.
Carbon dioxide is a waste product of cellular respiration. Oxygen is a waste product of photosynthesis. All cells release waste products to maintain ___________. (a stable environment)
homeostasis
When you observe the moon, you may notice it is a little farther east than it was the night before. How does the moon and the earth orbit?
The moon revolves around the earth and the earth revolves around the sun.
What is the term used for computers and other equipment used to collect any data over long periods of time and across great distances?
technology
2H20 + 3Na = how many total Hs?
4
Which of the following is a chemical reaction?
melts when heated, dissolves in water, or reacts with vinegar
reacts with vinegar
What would have the greatest human impact on a population of alligators or any other aquatic animal in Florida?
destroying habitats
How can you describe the number of stars in a galaxy and the number of galaxies in the universe?
billions of stars in a galaxy, billions of galaxies in the universe