chemical equations
What is a chemical equation?
A chemical equation is a way to show a chemical reaction using symbols and formulas. It shows the reactants (what you start with) and the products (what you end with).
What is a force?
A force is a push or a pull that can change the motion of an object.
What is an energy pyramid?
What is an energy pyramid?
What is an ecosystem?
An ecosystem is a community of living organisms and nonliving things interacting in a specific environment.
What are greenhouse gases?
Greenhouse gases are gases in Earth’s atmosphere that trap heat and keep the planet warm.
What are reactants and products?
Reactants are the substances you begin with in a chemical reaction.
Products are the new substances that are formed after the reaction.
What is motion?
Motion is when an object changes its position over time
What is found at the bottom of an energy pyramid?
Producers, like plants, are at the bottom because they make their own food using sunlight.
What are biotic and abiotic factors?
Biotic factors are living things (plants, animals).
Abiotic factors are nonliving things (water, sunlight, air, soil).
Name two examples of greenhouse gases.
Carbon dioxide (CO₂) and methane (CH₄).
What does it mean to balance a chemical equation?
Balancing a chemical equation means making sure there are the same number of each type of atom on both sides of the equation.
What is gravity?
Gravity is a force that pulls objects toward each other, especially toward the Earth.
What happens to energy as you move up the pyramid?
Energy decreases as you move up each level of the pyramid.
What is a food chain?
A food chain shows how energy moves from one organism to another through eating.
What is the greenhouse effect?
The greenhouse effect is when greenhouse gases trap heat from the Sun in Earth’s atmosphere.
Why is it important to balance chemical equations?
It is important because of the Law of Conservation of Mass, which says matter cannot be created or destroyed in a chemical reaction.
What happens when two forces act on an object in opposite directions?
The object will move in the direction of the stronger force, or not move if the forces are equal (balanced).
What are consumers in an energy pyramid?
Consumers are organisms that cannot make their own food and must eat other organisms for energy
What is the role of decomposers in an ecosystem?
Decomposers break down dead plants and animals, returning nutrients to the soil.
How do humans increase greenhouse gases?
Humans increase them by burning fossil fuels, cutting down forests, and raising livestock.
In the equation: 2H₂ + O₂ → 2H₂O, how many hydrogen atoms are on each side?
There are 4 hydrogen atoms on the left side and 4 hydrogen atoms on the right side.
What is friction?
Friction is a force that slows down or stops motion when two surfaces rub against each other.
Why are there fewer organisms at the top of the energy pyramid?
There is less energy available at higher levels, so fewer organisms can survive there.
How do humans impact ecosystems?
Humans can affect ecosystems by pollution, deforestation, and conserving resources.
Why are too many greenhouse gases a problem?
Too many greenhouse gases can cause global warming and climate change.