Test: Unit 7 - Ballistics Spring 2025 A significant part of balistics involves examining used: small, round pellets for telitale markings left on them by the firearm that shot them. gunpowder for telitale markings left on it by the firearm that shot it. bullets and their spent catridge casings for telltale markings left on them by the firearm that shot them. shot for tellitale markings left on them by the firearm that shot them.

## Step 1<br />The problem is about the field of ballistics, which is a branch of forensic science that studies the dynamics of projectiles, such as bullets and their spent cartridge casings. The question asks us to identify which of the given options is a significant part of ballistics.<br /><br />## Step 2<br />The options provided are:<br />- Small, round pellets for telltale markings left on them by the firearm that shot them.<br />- Gunpowder for telltale markings left on it by the firearm that shot it.<br />- Bullets and their spent cartridge casings for telltale markings left on them by the firearm that shot them.<br />- Shot for telltale markings left on them by the firearm that shot them.<br /><br />## Step 3<br />Among these options, the most significant part of ballistics involves examining bullets and their spent cartridge casings for telltale markings left on them by the firearm that shot them. This is because these markings can provide valuable information about the firearm that was used, such as its make, model, and serial number.