Jamal recently went on a Northern Lights tour to see the auroras in Iceland. How could the tour guide best describe what creates the aurora? A
The aurora is created when lighting gets trapped in clouds.

B
The aurora is created when a solar storm reaches Earth’s atmosphere.

C
The aurora is created when temperatures in Earth’s atmosphere increase.

D
The aurora is created when Earth is located directly between the sun and moon.

Fill in the blank 1. digestion occurs in the small intestine through the action of enzymes. 2. urea, excess water, and other waste materials are eliminated in a water fluid called 3. can cause infections by injecting dna or rna into hosts. 4. the human immune system produces in response to a vaccine, which later can bind to and destroy a pathogen if it invades. 5. are structures that link bone to bone at a joint 6. in the heart, blood flows from the right atrium to the right ventricle, where it is pumped to the the words i can use are: lymphocytes gliding pivot gas urine absorption dermis fulcrum lungs chemical viruses capillary vertebrae esophagus tendons antibodies synapses ligaments kidneys pathogens