Organisms and Environment
Organisms both depend on and compete for resources, and this drives many of their interactions with other organisms in their environment. For desert plants, like cactus, competition is likely greatest for which limited resource.
A. Sunlight
B. Space
C. Water
D. Carbon Dioxide
What is C - water.
If an atom has 10 protons, 10 neutrons, and 10 electrons, what is the mass of the atom?
What is 20
What is the law of conservation of Mass?
What is energy cannot be created nor destroyed, only rearranged.
Light sticks begin to glow when the vial inside the stick is broken. Chemicals inside the vial mix with chemicals outside of the vial. Which of the following statements BEST supports the idea that a chemical reaction, rather than a physical change, is occurring?
A. The vial is broken into smaller pieces.
B. Energy is released in the form of light.
C. Two different substances are combined.
D. The substances are in a flexible container.
What is two different substances combined.
Explanation: The two substances mix together to create a glowing reaction (change of color.)
How many Oxygen atoms are in Al₂(SO₄)₃
What is 12
The introduction of a non-native species into an ecosystem can result in serious ecological problems. This is often because the non-native species –
A. Adapts to changes quickly
B. Lacks natural predators
C. Mutations
D. Provides additional genetic diversity
What is B - Lacks natural predators
An atom of an element contains 20 protons. What is the identity of the element?
What is Calcium
If an element is shiny, can be hammered into thin sheets, and is a good conductor of electricity, what type of element is it?
What is a metal
Some spoons are made with the element silver (Ag). Over time, these spoons will turn black if they are not cleaned with a special solution. Explain why the element silver in the spoons turns black?
What is it reacts with oxygen to form a new substance.
Which chemical formula contains more elements?
Al₂(SO₄)₃
H2SO4
What is Al₂(SO₄)₃
When taken to a new habitat, non-native plants often threaten native plants of the new habitat. Why are the native plants threatened?
What is they take the resources from the native plants.
What subatomic particle identifies the element? (Allows us to know the identity of the element)
What is a proton
What two things can we determine from the valence electrons?
What is the group and chemical reactivity.
Which of the following examples shows that a chemical reaction has occurred?
A. A rock breaks into smaller pieces when it is struck with a hammer.
B. Rust forms on a hammer that has been left outside to long.
C. A cup of water turns pink when a few drops of red food coloring are added.
D. A solid is formed when heat is removed from a sample of water.
What is B - Rust forms on a hammer that has been left outside too long.
Explanation - Rust is a new substance the is a result of a chemical reaction.
How many different elements are present in H2COCH2
What is 3 elements.
As the population of prey decreases, the population of the predator which eats it will ....
What is decrease
Which of the following elements is MOST reactive
A. Ca
B. O
C. Ba
D. Fr
What is Fr.
The vertical (up and down) columns in the Periodic Table are called
What is groups
A student places a piece of a potato into a container of hydrogen peroxide. One observation the student makes is that bubbles form around the potato. The presence of bubbles might indicate the formation of a new substance because bubbles -
What is a gas is produced
Explanation - Gas being produced is a evidence of a chemical reaction taking place.
Daily Double!!!!!!
Is the following equation balanced or unbalanced?
Fe2 + S --> FeS
What is unbalanced.
Why do the populations of invasive species grow so quickly?
What is the invasive species have no predators.
What is the total number of protons, neutrons, and electrons in Rhenium, Re, atom that has a mass number of 186?
What is 261
Which group of the periodic table is composed of inert (not reactive) gases?
What are Noble Gases.
Which of the following is an example that includes evidence of a chemical reaction?
A. A sample of zinc is placed in water and it settles to the bottom
B. Sugar that is burned gives off an odor and turns brown and then black.
C. A solid block of ice is heated and it completely melts into a liquid.
D. A tomato is placed into a blender and chopped up into smaller pieces.
What is sugar that is burned gives off an odor and turns brown and then black.
5N2O represents the formula for "laughing gas" you might have at the dentist. The laughing gas helps calm your anxiety. How many atoms of nitrogen are present here?
What is 10 atoms.