Fact 1: Nuclear reactions in stars causes stars to produce light. Fact 2: Light contains energy. Given the two facts above, answer the question "What do nuclear reactions in stars cause?" with the following options: - heat energy - Change colors - production of energy - hydrogen and oxygen - only black holes - destruction of energy - creation of life - harmful substances
production of energy

(Question)
Fact 1: Evolution is a change in the characteristics of living things over time. Fact 2: Characteristics include traits like shape, color, size, and texture. Given the two facts above, answer the question "in evolution, what changes in living things over time?" with the following options: - traits - gravity - oxygen - mammals - h2o - alleles - animals - insects
(Answer)
traits

Ques: Fact 1: Burning fossil fuels increases the carbon in the atmosphere. Fact 2: An increase in carbon dioxide, therefore, can cause an increase in the temperature of the lower atmosphere. Given the two facts above, answer the question "What can can cause an increase in the temperature of the lower atmosphere?" with the following options: - solar flares - burning fossil fuels - gas expanding - Dehydration - Warm air moving into cold air - radio waves - Greenhouse gasses - Greenhouse gases
Ans: burning fossil fuels

(Q).
Fact 1: Blowing air into a whistle causes air to vibrate inside the whistle. Fact 2: Sounds are vibrations in air. Given the two facts above, answer the question "What creates sounds?" with the following options: - energy of moving objects - chemical messengers - the body's largest organ - peace - Thinking hard - Blowing a whistle - Electrical energy - death
(A).
Blowing a whistle

Ques:Fact 1: Evolution occurs by a process called natural selection. Fact 2: Natural selection only selects functionally advantageous systems. Given the two facts above, answer the question "What is usually chosen in evolution?" with the following options: - common traits - Plant reproduction - advantageous systems - undesirable traits - Animal survival - competition - mysterious sytems - Earth revolving around the sun

Ans:advantageous systems

Fact 1: If a plant requires less water then that plant will survive in a drought. Fact 2: When there is a drought, there is no water under the fence. Given the two facts above, answer the question "if plants require less water, then that plant can survive when?" with the following options: - It becomes dormant - waxy leaves - It remains dormant - no water under the fence - in outer space - forest is destroyed - cloudy and rainy weather - stem cells
no water under the fence