The moon appears half lit, half dark from the surface of Earth on two days each month. What causes this? (1 point) Half of the moon's surface that is illuminated by the sun is visible from Earth's perspective.

Earth’s shadow is blocking the light from the sun.

Half of the moon is totally eclipsed.

It is a partial lunar eclipse.

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