Earth & Space
Saturn
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The smallest part of an atom is the ______________ that orbits in a cloud.
Electron
If we add carbon dioxide, water and sunlight together we will get sugar and oxygen. This process is called __________.
Photosynthesis
A _____________ boundary is when two tectonic plates collide and push together
Convergent
What color stars are the hottest?
Blue
hypothesis
If we add the number of protons and the number of neutrons together we will get an element's ____________ number
Mass
This organelle can only be found in plant cells. It helps plants take in light energy from the sun.
Chloroplasts
The Earth is surrounded by a layer of gases called the ________________
atmosphere
These two gases are abundant in space.
hydrogen and helium
True or False. Scientific theories are permanent.
False
Milk has a pH between 6.5 and 6.9. This makes it a __________ acid.
weak
The lungs, nose, trachea and other breathing organs make up the _____________ system.
respiratory
A continuous process where rocks are transformed between three main types: igneous, sedimentary, and metamorphic
rock cycle
dwarf planet
The variable that is not changed in an experiment. It is kept constant so that it does not affect the dependent variable.
control
_____________ are horizontal on the periodic table.
Periods
In animal cells, cellular respiration happens in the cytoplasm and the ______________
mitochondria
What scientist is known for the discovery of gravity?
Sir Isaac Newton
In what part of the Sun does nuclear fusion take place?
the core
Once a scientist has asked a question and made a hypothesis, the next step of the scientific process is to perform an _____________.
Experiment
What type of bond is formed when atoms share electrons?
covalent
What organ of the human body would start the digestive process?
Mouth
What is the pH of pure water?