Which of the following is not a type of galaxy? (4 points) random galaxy irregular galaxy spiral galaxy elliptical galaxy.

The correct answer is A.) random galaxy.

Let's look at the options:

- Irregular Galaxy: A type of galaxy that does not have a distinct regular shape.

- Spiral Galaxy: The Milky Way is a Spiral Galaxy. This type of galaxy is in the shape of a spiral.

- Elliptical Galaxy: Has an ellipsoidal shape and a smooth, nearly featureless image

- Random Galaxy: This type of galaxy doesn't exist.

answer : one can design an experiment using a liquid and an additive that can be added to the liquid and observe the chemical changes in the reaction species.

one would need a beaker which is filled with a known amount of the liquid in which thermometer is placed to measure the temperature changes; after addition of the additive to the liquid solution one can note down the temperature change and find whether the reaction is endothermic or exothermic in nature. by subtracting the initial temperature value with the final temperature one can find the temperature changes.

various combinations of liquid and additive can be used. liquid in this case can be a known quantity of water and additives can be epsom salt or without epsom salt the experiment can be conducted to notice the changes. water and ice, hydrogen peroxide and dry yeast, vinegar and baking soda,etc.