Photosynthesis
What is the main source of energy for photosynthesis in plants?
Sun
What is the role of producers in a food web?
To produce energy for herbivores and oxygen for living things.
Identify two physical properties of solids.
Definite volume and shape, tightly packed particles
What is a mixture?
A combination of two or more substances that are not chemically combined.
According to Newton's First Law of Motion, an object at rest will stay at rest unless __.
A force acts upon it
Explain the basic process of photosynthesis in plants.
Water, CO2, and sunlight cook together to form sugar and oxygen
Differentiate between primary consumers and secondary consumers in a food chain.
Primary=herbivore
Secondary= carnivore OR omnivore
Explain how scientists classify materials based on their properties.
scientists can classify materials into categories based on similarities and differences. Conductors, insulators, density, solubility, etc...
Give an example of a mixture that can be easily separated by using a sieve/sifter.
Sand and rocks
sieve/sifting=SOLIDS
F=MxA is which of Newton's laws?
2nd
How do plants use the energy produced during photosynthesis?
They store the glucose for food.
Explain the importance of decomposers in an ecosystem.
Break down dead organisms and return nutrients to the soil.
What determines whether an object will sink or float in a liquid?
Density
How can you separate a solution of saltwater into salt and water?
Evaporation
Newton's Second Law of Motion states that the acceleration of an object depends on the ____ applied to it and the mass of the object.
Force
Describe how photosynthesis can occur both naturally.
During natural photosynthesis, plants, algae, and some bacteria use sunlight to convert carbon dioxide and water into glucose (a type of sugar) and oxygen.
Create a simple food chain model with a producer, primary consumer, and secondary consumer.
Answers vary
Predict how the density of an object affects its ability to float in a liquid.
In order for an object to float, it has to be LESS DENSE than the liquid.
Investigate how temperature change affects the rate at which a solute dissolves in a solvent.
Cold=slow dissolving
Hot=fast dissolving
If you give a push to a toy car, what law of motion are you demonstrating when the car moves forward?
1st
Why is photosynthesis important for the survival of plants and other organisms?
All things would die without photosynthesis. Answers can vary
How does energy flow through a food web?
energy is transferred from one trophic level to the next.
What property of matter refers to the ability of a substance to dissolve in a solvent?
Solubility
How does the concentration of a solution relate to the amount of solute and solvent present?
More concentration= more solute
less concentration=less solute
When you jump off a diving board, what law of motion explains why you move in the opposite direction of the diving board?
3rd