Physics
A cyclist travels a distance of 30 kilometers in 2 hours. What is the average speed of the cyclist?
15 km/h
The center of an atom is called the nucleus. Which two subatomic particles are found inside the nucleus, and what are their electrical charges?
Protons (Positive charge) and Neutrons (Neutral/No charge).
In both plant and animal cells, which organelle contains the genetic material (DNA) and acts as the "brain" or control center of the cell?
The Nucleus. It holds the instructions for everything the cell does.
There is an imaginary line that sits at 0^{\circ} latitude and circles the middle of the Earth. What is this line called, and into which two hemispheres does it divide the world?
The Equator. It divides the Earth into the Northern Hemisphere and the Southern Hemisphere.
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67
Explain the primary difference between the molecular arrangement of a liquid and a gas. Which one has a definite volume but no definite shape?
Liquids have a definite volume but no definite shape
Is Pure Water (H2O) considered an element or a compound? Explain your answer based on what atoms make up a water molecule.
Compound. It is made of two different elements (Hydrogen and Oxygen) chemically bonded together.
Plant cells have two specific structures that animal cells do not have. One provides a rigid outer shape, and the other allows the plant to make food from sunlight. What are these two structures called?
The Cell Wall (for support/shape) and Chloroplasts (for photosynthesis).
Which continent is the largest in the world by both land area and population? It contains the world's highest mountain range, the Himalayas.
Asia. It is the largest continent and is home to more than half of the world's population.
1990-1962
28
If an object is moved from the Earth to the Moon, which of its properties stays the same: its mass or its weight?
The mass stays the same.
Classify the following two scenarios:
A: Dissolving salt into a glass of warm water.
B: A silver spoon turning black (tarnishing) over time.
Which is a physical change and which is a chemical change?
A is Physical (the salt is still salt, just dissolved); B is Chemical (a new substance, silver sulfide, has formed on the surface).
Which body system is responsible for breaking down food into nutrients that the body can absorb, and which organ in this system does most of the nutrient absorption?
The Digestive System. Most nutrient absorption happens in the small intestine.
If you wanted to see the location of the Rocky Mountains or the Amazon River, would you look at a Physical Map or a Political Map? What is the main purpose of the other type of map?
You would use a Physical Map. A Political Map is used to show human-made boundaries, such as borders between countries, states, and cities.
2013-1973
40
You have two cubes of the same size. Cube A is made of iron and Cube B is made of wood. Which cube has a higher density, and what will happen if you place both in a tank of water?
Cube A (iron) has a higher density.
The Periodic Table organizes elements into vertical columns called Groups. Elements in the same group usually share similar properties. What is the chemical symbol for Hydrogen, and why is it often placed at the very top left of the table?
The symbol is H. It is placed there because it has 1 proton (Atomic Number 1), making it the simplest and lightest element.
Plants need three main "ingredients" to perform photosynthesis and create glucose (sugar). Two of these are water and sunlight. What is the third ingredient that plants absorb from the air?
Carbon Dioxide (CO2). Plants breathe this in through tiny holes in their leaves called stomata.
The Earth's outer shell is broken into large pieces called Tectonic Plates. When these plates slide past each other or collide, what are two major geological events that can occur on the Earth's surface?
Earthquakes and Mountain Building (or Volcanic Eruptions).
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Why are there small gaps left between the sections of metal rails on a railroad track? What happens to the metal on a very hot summer day?
To allow for thermal expansion.
If you have a mixture of sand and iron filings, what is the easiest physical method to separate the iron from the sand without using water?
Iron is magnetic, while sand is not, so the magnet will pull the iron filings right out of the mixture.
In an ecosystem, why are green plants called producers, while animals like rabbits or lions are called consumers?
Plants are producers because they make their own food using energy from the sun. Animals are consumers because they must eat plants or other animals to get their energy.
In geography, we study how water moves around the planet. What is the name of the process where water vapor cools down in the atmosphere and turns back into liquid droplets to form clouds?
Condensation. (This follows Evaporation and comes before Precipitation like rain or snow).
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