You are presented with the question "What happens to the density of a gas when heated?" and the following answer choices: - stays constant - Temperature - energy - Energy. - decreases - nothing - Evaporation - increases Now knowing that if gas is heated then that gas will expand and if a material is heated, it expands and the density decreases, choose the best answer.
decreases
(Question)
You are presented with the question "What can cause landslides?" and the following answer choices: - The flow of water - loose soil - Drought - deforestation - Adequate subsurface drainage - mouth of rivers - Physical weathering - Lack of rain Now knowing that erosion can cause a landslide and and the erosion caused by the unimpeded flow of water is an example of unintentional change, choose the best answer.
(Answer)
The flow of water
Ques: You are presented with the question "What can help with seeing in the dark?" and the following answer choices: - bushes - Eyedroppers - Magic - satellites - cactuses - Electricity - Telescopes - focusing a lens Now knowing that alight bulb is used for seeing in the dark and electricity can run appliances and illuminate light bulbs, choose the best answer.
Ans: Electricity
(Q).
You are presented with the question "What harms the respiratory and circulatory systems?" and the following answer choices: - oil - Cars - coal - water - air - sulfur - bees - dust Now knowing that air pollution harms the respiratory and circulatory systems and dust contributes to air pollution, choose the best answer.
(A).
dust
Ques:You are presented with the question "Electrons separating from what in certain bright astronomical objects forms plasma?" and the following answer choices: - flames - iron - Energy. - atoms - matter - energy - quarks - rocks Now knowing that plasma is formed by electrons separating from atoms in stars and color can be seen in some bright astronomical objects, such as stars, and bright planetary nebulae, choose the best answer.

Ans:atoms
Ques: You are presented with the question "what contain a right hand double helix of polynucleotides but not much else" and the following answer choices: - orchids - newsprint - alleles - Viruses - soil - ferns - animals - plants Now knowing that viruses contain DNA but not much else and dNA Structure DNA Structure DNA is a right hand double helix of polynucleotides, choose the best answer.
Ans:
Viruses